NEW YORK (AP) _ Two policemen walked into a diner during a stickup and were wounded early Monday before a third officer shot the two robbers, one of whom hijacked a bread truck and escaped, police said.

They were the seventh and eighth uniformed police officers wounded in the city within six days.

Officers William Luongo, 33, of Long Beach, and William J. Moran, 25, of Rockaway Park, members of the Port Authority police force for about six months, were in critical but stable condition at Jamaica Hospital, but hospital spokesman Fred Sganga said the outlook for both was excellent.

Officer Wilfred Barriere, who stayed in the car while the other two officers went into the diner, said they had just gotten through the front door when a shot sounded, according to Queens Detectives Commander Joseph Borrelli.

''The first perp (perpetrator) comes out and turns and points the gun at me,'' Barriere's account said. ''I hit (him) and he goes down.''

He said he fired at the second stickup man, who turned and ran through a back door.

Police said the fleeing man stole a car two blocks away and later stopped bread truck driver Sam Berk.

Berk said the man, who was bleeding down the right side, told him: ''I just killed two cops. You're taking me to the Bronx or I'll kill you, too.'' But the gunman got out before they reached the Bronx when he met two waiting confederates, Berk said.

The captured suspect, identified as Glen Graham, 25, underwent surgery at Elmhurst Hospital for multiple gunshots, said hospital spokeswoman Eileen Hinrichs.

On Wednesday, six New York City officers were shot in a gunfight when they tried to arrest a multiple-murder suspect, Larry Davis, 20, who is the object of a nationwide hunt.

The 1,430 Port Authority officers patrol transportation, trade and port facilities of the New York-New Jersey agency. Three of its officers have been killed on duty in the force's 58 years.