Kenya police: 174 people killed in attacks in 2014 by Somali extremists al-Shabab

CORRECTS AMOUNT KILLED TO 173: FILE - In this Thursday, Feb. 17, 2011 file photo, hundreds of newly trained al-Shabab fighters perform military exercises in the Lafofe area some 18 km south of Mogadishu, in Somalia. Kenya's police force said Wednesday, Feb. 25, 2015 that 173 people were killed in 2014 in attacks by Islamic extremists, the highest number in the three years that Kenya has experienced violence blamed on neighboring Somalia's al-Shabab militants. (AP Photo/Farah Abdi Warsameh, File) (The Associated Press)

CORRECTS AMOUNT KILLED TO 173: FILE - In this Saturday, Nov. 22, 2014 file photo, the bodies of some of the victims lie in a line on the ground, at the location of an attack on a bus about 50 kilometers (31 miles) outside the town of Mandera, near the Somali border in northeastern Kenya, which killed dozens of non-Muslims who were singled out, and for which responsibility was claimed by militant group al-Shabab. Kenya's police force said Wednesday, Feb. 25, 2015 that 173 people were killed in 2014 in attacks by Islamic extremists, the highest number in the three years that Kenya has experienced violence blamed on neighboring Somalia's al-Shabab militants. (AP Photo, File) (The Associated Press)

CORRECTS AMOUNT KILLED TO 173: FILE - In this Wednesday, Dec. 3, 2014 file photo, a woman is assisted by Red Cross workers as she is overcome by emotion after seeing the body of a relative who was killed in Tuesday's attack that killed dozens of non-Muslims who were singled out, for which militant group al-Shabab claimed responsibility, at the mortuary in Nairobi, Kenya. Kenya's police force said Wednesday, Feb. 25, 2015 that 173 people were killed in 2014 in attacks by Islamic extremists, the highest number in the three years that Kenya has experienced violence blamed on neighboring Somalia's al-Shabab militants. (AP Photo/Khalil Senosi, File) (The Associated Press)

Kenya's police force says 174 people were killed in 2014 in attacks by Islamic extremists, the highest number in the three years that Kenya has experienced violence blamed on neighboring Somalia's al-Shabab militants.

In statistics released Wednesday the Kenyan police said 312 people were killed in the country in militant attacks since 2012 and 779 people were wounded during the period.

Al- Shabab has vowed retribution for Kenya sending troops to Somalia. Kenya deployed its troops to Somalia in October 2011 to fight the extremist rebels who had carried out cross border attacks including the kidnapping of four Europeans.

Al-Shabab, in a video released Saturday, threatened more attacks similar to its 2013 assault on the Westgate Mall in Nairobi, in which 67 people were killed.