Seattle, Washington (AP) — A man has been arrested in connection with a spate of random stabbings over two days in Seattle, in which nine people were injured – five of them on Friday afternoon, police said.

“This incident was apparently one individual over a 38-hour period of time committing random assaults,” Deputy Chief Eric Barden said at the scene Friday.

The stabbings on Friday afternoon took place in a roughly four-block area in Seattle’s Chinatown-International District.

Witnesses reported a description of the suspect and officers found him nearby and took him into custody, police said. A weapon was found near the person who was arrested, and a knife was lodged in one of the victims, police said.

Four of the victims were taken to Harborview Medical Center in Seattle and one victim was treated at the scene and released. A Harborview spokesperson confirmed four victims were at the hospital and said all were in critical condition. As of Friday evening, two of them remained in critical condition, one had been upgraded to serious condition and the other to satisfactory condition, the spokesperson said.

Barden said police suspect that the person arrested in connection with Friday’s stabbings is the same person involved with at least four other stabbings that happened starting early Thursday. He cited similar suspect descriptions and the randomness of the attacks, but added that the investigation is ongoing.

The Thursday stabbings in Chinatown started when a 52-year-old woman was found with multiple stab wounds, police said. On Thursday afternoon, a 32-year-old man was found after being stabbed multiple times and at about 8 p.m. a 37-year-old man was stabbed multiple times in the back, police said.

Then early on Friday, police responding to an assault call found a 53-year-old man bleeding heavily from a neck injury. Police followed a blood trail to a nearby doorway and unsuccessfully used that as a starting point for police dogs to try and track a suspect.

“It is my understanding that everyone is alive,” Barden said of the victims on Friday afternoon.

Police said a 10th stabbing on Thursday night involved a cellphone robbery in which someone forcibly opened a vehicle door and tried to stab a 60-year-old man in the chest. The victim blocked the assault and was cut on his hand, police said. It was not clear that it was connected to the random attacks, police said.