Plane crashes in Afghanistan, killing 4 foreign troops; Taliban announces spring offensive

In this April 10, 2013 photo released by the U.S. Army, U.S. Soldiers with Charlie Company, 1st Battalion, 38th Infantry Regiment, 4th Brigade Combat Team, 2nd Infantry Division cross the Tarnak river in the Panjwai district of Kandahar province, Afghanistan on a two-day mission to clear the area of explosives caches. The Taliban have announced they will launch their spring offensive on Sunday, April 28, 2013, signaling plans to step up attacks as the weather warms across Afghanistan, making both travel and fighting easier. (AP Photo/Sgt. Kimberly Hackbarth, U.S. Army) (The Associated Press)

FILE - In this Thursday, April 4, 2013 file photo, an Afghan army soldier stands guard in the destroyed courthouse in Farah, western Afghanistan, after suicide bombers disguised as Afghan soldiers stormed the courthous in a failed bid to free more than a dozen Taliban prisoners. he Taliban have announced they will launch their spring offensive on Sunday, April 28, 2013, signaling plans to step up attacks as the weather warms across Afghanistan, making both travel and fighting easier. (AP Photo/Hoshang Hashimi, File) (The Associated Press)

In this April 10, 2013 photo released by the U.S. Army, soldiers assigned to Charlie Company, 1st Battalion, 38th Infantry Regiment, 4th Brigade Combat Team, 2nd Infantry Division provide security for a hasty patrol base in the Registan Desert in Kandahar province, Afghanistan during a two-day operation to deter insurgents and clear the area of explosives caches. The Taliban have announced they will launch their spring offensive on Sunday, April 28, 2013 signaling plans to step up attacks as the weather warms across Afghanistan, making both travel and fighting easier. (AP Photo/Sgt. Kimberly Hackbarth, U.S. Army) (The Associated Press)

A plane crashed in southern Afghanistan on Saturday, killing four international service members on the same day the Taliban said they were gearing up to launch their spring offensive with attacks on military and diplomatic targets.

Initial reporting indicated there was no enemy activity in the area where the plane went down, the NATO-led coalition said in a statement confirming the crash. Coalition personnel secured the site and were investigating the cause of the crash, NATO said.

The brief statement did not identify the nationalities of the victims, or say exactly where the crash occurred.

However, Mohammad Jan Rasoulyar, deputy governor of the southern province of Zabul, said an aircraft belonging to foreign forces crashed Saturday afternoon in Shah Joy district. He confirmed the site had been surrounded by international forces.

The spring Taliban offensive, which is to begin on Sunday, comes as U.S.-backed efforts to try to reconcile the Islamic militant movement with the Afghan government have so far failed.

Insurgents already have stepped up attacks this spring as they try to position themselves for power ahead of national elections and the planned withdrawal of most U.S. and other foreign combat troops by the end of 2014.

The Afghan Defense Ministry said its security forces are prepared for Taliban's new campaign. "The Afghan National Army is ready to neutralize the offensive," the ministry said, adding that the soldiers now have the support and trust of many Afghans.

The Taliban's leadership vowed on Saturday that "every possible tactic will be utilized in order to detain or inflict heavy casualties on the foreign transgressors" during its spring offensive.

In a sign of Taliban's determination to replace Afghanistan's government with one promoting a stricter interpretation of Islamic law, the insurgents named the new offensive after a legendary Muslim military commander, Khalid ibn al-Walid. Also known as the "Drawn Sword of God," he was a companion of Islam's Prophet Muhammad.

The Taliban threatened to infiltrate the Afghan security forces and conduct more attacks on Afghan policemen and soldiers as well as foreign troops. Such attacks threaten the strength of the Afghan forces as they work to take over responsibility from international troops. The latest one occurred in March, when a member of Afghanistan's government-backed village defense program shot and killed five of his colleagues in Badghis province in northwest Afghanistan

April has already been the worst month for combat deaths so far this year. According to an Associated Press tally, 257 people — including civilians, Afghan security forces and foreign troops — have been killed in violence around the nation. During that time 217 insurgents have died.

Last year during the month of April, 179 civilians, foreign troops and Afghan security forces were killed and 268 insurgents.

Still, U.S. Marine Gen. Joseph Dunford, the top commander of U.S. and NATO forces in Afghanistan, said Wednesday that the security situation had improved across the country, with Afghan forces now leading 80 percent of all conventional operations.

As the traditional fighting season begins, the insurgents will face a combined Afghan force of 350,000 soldiers and police, he said.

"The insurgency can no longer use the justification that it is fighting foreign occupiers — that message rings hollow," Dunford said in a statement.

Elsewhere in Afghanistan, the Taliban late Friday freed nine civilian de-miners it had captured in the southern province of Kandahar after negotiations involving tribal elders, provincial spokesman Javeed Faisal said.

The Afghan men were being driven back from a mine field last Sunday when they were captured. Afghanistan has a legacy of land mines going back decades and remains one of the most heavily mined countries in the world.

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AP writer Rahim Faiez in Kabul contributed to this report.

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