Three Baltimore police officers have been placed on administrative duty pending investigations into two police shootings of unarmed people that occurred during an eight-hour period Thursday, officials said yesterday.

Police identified the officers in the first shooting - which occurred about 12:30 p.m. in the 1500 block of N. Caroline St. - as Louis Holley and Hans Nicolas.

The officers were raiding a house in that block and confronted James W. Whitworth, 57. Whitworth refused to obey an officer's orders to show his hands and was shot in one of his legs and in the chest as he reached for a drawer, police said. Holley, an 11-year veteran, fired three times; Nicolas, a seven-year veteran, fired twice.

The second shooting occurred about 8 p.m. as Officer Matthew Gibson approached Matthew Murray, 16, in the 1800 block of E. Eager St., police said.

Gibson, who joined the force in August last year, was responding to a report of an armed person, and stopped the teen-ager in front of a rowhouse, police said.

Police said yesterday that the officer ordered Murray to take his hands out of his pockets, but the teen-ager refused to remove at least one hand. The boy then made a threatening move and the officer opened fire, police said.

Whitworth and Murray were being treated at Johns Hopkins Hospital yesterday for nonlife-threatening injuries, officials said.