The FBI today announced a $20,000 reward for information leading to the arrest and conviction of whoever tried - and failed - three times to set Chabad centers in Arlington and Needham on fire.

That's in addition to reward money previously put up by Jewish and Islamic groups.

The FBI reports it's looking for a man, about 5'11" and wearing "a dark North Face jacket with the hood pulled over his head and khaki pants."

In Arlington, the man set fire to a rabbi's home, which doubled as the local center for his Chabad congregation, twice in April. The second fire happened about 70 minutes before a similar fire at a Chabad rabbi's home in Needham.