There’s a reward of up to $50,000 offered for information leading to the arrest and conviction of the men who robbed a postal truck driver Friday in Porter Square, Postal Inspector Bernadette Lundbohm said today.

The robbery was pulled off by two white men at about 6 p.m. Friday at the 1953 Massachusetts Ave. office, Lundbohm said. Other details were scant.

Anyone with information is asked to call the U.S. Postal Inspection Service 24-hour toll-free number at (877) 876-2455 or Cambridge Police at (617) 349-3370.