At least 20 people killed in gas cylinder explosion in restaurant in central India

In this frame grab from video, people help at the scene after an explosion at a restaurant, Saturday, Sept. 12, 2015, in Petlawad, India. More than 80 people were killed when a cooking gas cylinder exploded and triggered a second blast of mine detonators stored illegally nearby, police said. (AP Photo/AP video) (The Associated Press)

In this frame grab from video, people help sift through and clear debris at the scene after an explosion at a restaurant, Saturday, Sept. 12, 2015, in Petlawad, India. More than 80 people were killed when a cooking gas cylinder exploded and triggered a second blast of mine detonators stored illegally nearby, police said. (AP Photo/AP video) (The Associated Press)

An injured man, whose relatives were killed, cries at the site of an explosion, with bodies of the dead lying around him, in Petlawad, in the central Indian state of Madhya Pradesh, Saturday, Sept. 12, 2015. Dozens of people were killed at a restaurant in central India on Saturday when a cooking gas cylinder exploded and triggered a second blast of mine detonators stored illegally nearby, police said. (AP Photo/Manoj Jani) (The Associated Press)

Police say at least 20 people have been killed when a cooking gas cylinder exploded in a restaurant in the central Indian state of Madhya Pradesh.

Scores of people were injured when the roof of the building caved in with the force of the explosion Saturday in Petlawad town.

An officer in the Petlawad police control room said 20 bodies were pulled out of the debris and rescue workers are searching for survivors.

The restaurant located near the town's bus station was crowded when the blast occurred.

Petlawad is about 310 kilometers (190 miles) west of the state capital, Bhopal.