NORTHAMPTON, Pa. (AP) _ Two bank robbers, firing their weapons as they came through the doors, shot and killed three people today and wounded at least two others before fleeing, authorities said.

Four of the people shot during the robbery at the First National Bank of Bath office in Allen Township were believed to be employees, said state police Capt. Benjamin Brooks. The other person was believed to be a customer, he said.

The gunmen entered the bank firing their weapons, Brooks said.

The pair were described as white males in their early 20s, between 5 feet, 8inches and 5-foot-10, wearing white painter caps and blue jeans, police said.

The FBI is aiding the investigation, and a police command center was set up outside the rural bank office, police said.

The two men fled by car following the shootings, and police said they were looking for two white men in a brown or tan Oldsmobile or Buick. Roadblocks were set up and a state police helicopter was searching the area, about 60 miles north of Philadelphia near Allentown in eastern Pennsylvania.

Brooks said it had not been determined whether any money was taken.

A person answering a phone at the bank said only that it was closed and then she hung up.

One person, Thomas Marchetto, 37, of Bath, Pa., was in critical condition at Muhlenberg Hospital Center in Bethlehem, said hospital spokeswoman Dorothy Holveck. She declined to disclose the nature of his injuries, but said he had been a customer at the bank.

At least one person was taken to Lehigh Valley Medical Center in Allentown, police said, but no condition was available.

On May 29, the bank was broken into about 4:30 a.m. by what were believed to be vandals, police said. Equipment inside was smashed, including cameras, and state police said at the time the vandalism could have been attempt to knock the cameras out for later robbery try.