Suspect in Bangkok Bombing Didn't Act Alone

The man who bombed a religious shrine in Bangkok did not act alone, authorities say.

Police say security video shows two others who may have helped carry out the attack.

"He didn't do it alone for sure. It's a network," Police Chief Somyot Poompanmoung told the Associated Press, saying he's certain Thai citizens were involved.

Little is known about the suspect apart from a sketch drawn from a taxi driver's description and blurry security video.

The video shows the man leaving a backpack at the shrine 15 minutes before the blast.

At least 20 people died and more than 120 were injured in what police are calling the worst attack in Bangkok's history.

Police don't know why the suspect set off the bomb, where he's from, or even if he's still in the country. They're offering a reward for more information.