The suspected bomber of the London bus attack has been identified as among the 13 who died, according to police sources.

Sky News crime correspondent Martin Brunt said it was still not clear if the man had been a suicide bomber.

It follows witness reports of a man on the No 30 bus in an agitated state looking into his bag up to 12 times before the blast.

Brunt said police were poised to make a number of arrests in London.

More from FOX:

Authorities used blasts to raid one of several residences in northern England Tuesday as sources said London police identified the bomber of a bus in multiple blasts last week.

Neighbors of one of the five houses being searched told Sky News that a 22-year-old man who lived there with his family went missing last week.

Also Tuesday, FOX was told that a car parked at a train station in Luton, near London, was cordoned off and being investigated in connection with last week's bombings.

More here

Update

As of 11:22EST, FOX is reporting that an arrest has been made. More as we get it.

From SKY

ALL FOUR BOMBERS DIED All four suspected bombers died during the London terror attacks, according to police sources.

Sky News crime correspondent Martin Brunt said three bombers died on the Tube and one on the No 30 bus.

It was still not clear if the man on the bus had been a suicide bomber.

It follows witness reports of a man on the No 30 bus in an agitated state constantly looking into his bag before the blast in Tavistock Square.

Brunt said police had made a number of arrests in Leeds today in relation to last Thursday's bombings.

They were also poised to make arrests in London, he said.