aw enforcement officials don’t have any official suspects in Monday’s twin bombings at the finish line of the Boston marathon. And President Obama specifically urged people not to speculate on who’s behind the attack, which killed at least three people, including an 8-year-old boy, and wounded more than 100 others, including several amputations.

“We still don’t know who did this or why,” Obama said Monday night. “People should not jump to conclusions before we have all the facts. But make no mistake. We will get to the bottom of this. We will find out who did this. We will find out why they did this. Any individual or responsible groups will feel the full weight of justice.”

Click below for the full article on 4 theories of who was behind the attacks.

http://theweek.com/article/index/242773/whos-behind-the-boston-marathon-bombings-4-theories