A Northwest Washington man was shot and killed last night in the 1400 block of V Street NW, a block from the city's 3rd District police station, D.C. homicide detectives said.

In an unrelated incident earlier yesterday, a District policeman shot and critically wounded a Washington man as the two wrestled for the officer's service revolver.

In the first incident, Paul A. Knight, of 7422 Georgia Ave. NW, was shot once in the upper chest by a small caliber pistol as he was standing on the northeast corner of 15th and V streets NW about 8:30 p.m., D.C. police said.

Police said Knight ran about a block after he was shot and collapsed in the street at the intersection of 15th Street and New Hampshire Avenue NW. Officers from a special narcotics unit working in the area told investigators they saw the man fall into the street. Knight, 30, was taken to Washington Hospital Center where he was pronounced dead a short time later, police said.

In the earlier incident, John D. Allen, 36, of an unknown address, was shot in the left shoulder following an altercation with officer Rick Pearson. Police said Pearson was called to 81 New York Ave. NW to calm a domestic disagreement. Soon after Pearson arrived, Allen started arguing with the policeman and took his service revolver from the officer during a struggle, police said. Pearson took the weapon back and shot Allen once as he continued to wrestle Pearson for the gun, police said.

Allen was taken to Washington Hospital Center where he was listed in critical condition last night. Pearson, who suffered facial injuries and a cut on the hand, was treated at Washington Hospital Center and released. Pearson is assigned to the 1st District.