D.C. police are investigating the Tuesday night rapes of two women and an attack yesterday afternoon that left a Northwest Washington woman critically injured in her home.

A 30-year-old District government employe was accosted shortly after 10 p.m. Tuesday by four young men while she was unloading articles from her car parked near her home. The men forced her to drive the car to Shaw Junior High School, where they dragged her to the school's basement and bound her with her own belt, after which she was raped by all four assailants.

The assailants then took all her clothes and left. The victim freed herself and ran to the school's second floor where she called out for help. One of her attackers heard her scream and ran up the stairs to her side. The victim then jumped frm a second-floor window, and was found by police on the ground doubled up in pain with a broken left ankle. She was taken to Howard University where she was treated and released. It was not known who summoned police.

The second incident began about 10:30 Tuesday night when a man, described as about 30 years ld, opened the unlocked door of a car being driven by a 23-year-old unemployed secretary and climbed into the car at a stop sign at Second and W streets NW. Then he ordered the woman to abandon her auto and enter his, parked nearby.

According to police, the man forced the victim to accompany him to a nearby vacant elementary school where he raped her. He then forced her back into his car, drove her to her neighborhood and pushed her from the vehicle. Police said the victim was fund nude and screaming, and had to be tied to a stretcher by medical personnel. She too was taken to Howard University Hospital where she was treated for rape and shock and released.

Early yesterday afternoon, the wife of a Washington correspondent for a European newspaper was attacked in her Northwest Washington home. Police said that the woman was on the second floor when she heard glass breaking in her basement.

Police said she apparently came upon the intruder on the first-floor landing, struggled with him there and on the stairway leading to the second-floor bedroom. Police said they found the woman, nude and unconscious, on a bed in the second-floor room. The authorities had been called by neighbors who had seen a man fleeing the house and thought that it had been burglarized.

The woman's 2-year-old daughter later was found unharmed, hiding under a pile of blankets under a table in another second-floor bedroom, according to police.

The victim was admitted to Georgetown University Hospital for treatment of multiple head injuries that police said apparently were inflicted with a blunt instrument. Her condition was described as critical.

Police were looking for a man about 6 feet tall and in his 30s who was being sought for assault with intent to kill and burglary.