. >> conor powell is live in jerusalem with more. conoror, what do we know about the attacker at this point? >> reporter: arthel, very little is known at this point about the attacker or his motive. police are, as you said, treating this as a possible terror incident. the attacker is in custody after being tased by police on the scene. it's believed he's about age 29, in his late 20s, according to authorities the man appears to have been working alone. right now british police are saying they're not looking for anyone else in connection to this attack. at least three people were injured in this knife attack. all of them, though, appear to be likely to survive, though one was injured pretty seriously. police are treating this as a terror act because several witnesses say they heard the attacker scream "this is for the syrian people." though there's no mention of isis in his screaming, the uk parliament of course just did vote to expand its air strikes against isis in syria this past week. it's not clear if the attacker was inspired by