A woman was stabbed Thursday night in the Petworth neighborhood of Northwest Washington, but police said they didn’t think it was connected to three other recent stabbings of women in that area.

The assault at Fifth and Allison streets happened just after 7 p.m., and few details were available. The woman was taken to a hospital, and her injuries were not believed to be life-threatening. Police said they were looking for a female assailant.

On Wednesday, D.C. Police Chief Cathy L. Lanier said officers were searching for a man who they think stabbed four women in Northwest in recent weeks.

Just after midnight Wednesday, a man tackled a woman only a few blocks away, in the 1100 block of Allison Street NW. That woman screamed, fought off the man and suffered minor cuts.

Thomas Roulhac, 55, has lived in Petworth for 13 years. He said many newcomers have moved in, making it harder for residents to know neighbors. He worries about his wife’s safety.

“You don’t want to be a prisoner in your own neighborhood, but it’s hard to trust sometimes,” he said.

The assault Thursday night in Petworth was one of at least four stabbings in various parts of the city. Police said the incidents appeared unrelated.

About 6:20 p.m., a man was found stabbed in Southeast. Police classified the attack in the 5700 block of Southern Avenue as an assault with intent to kill. The man was expected to survive, police said.

About 6:40, police responded to 11th and P streets NW in the Logan Circle area, where a man was cut multiple times. His injuries were not believed to be life-threatening. And less than two hours later, a man was found after being stabbed in the 100 block of Atlantic Street SE.