The suspect in Saturday night's deadly knife attack on a bullet train allegedly slashed two women who sat next to him in the space of just a few seconds, investigators said Tuesday.

Ichiro Kojima, 22, who was sent to prosecutors Monday on suspicion of murder, "suddenly stood up and hacked at me without saying anything," police quoted a 27-year-old woman, who had been seated to his right, as saying. She soon escaped to the rear of the 12th car of the shinkansen, which was bound for Shin-Osaka Station from Tokyo.

The other woman, 26, who sat on his left across the aisle, rushed to the rear of the car immediately after noticing what happened, but was allegedly slashed by Kojima from behind, the police said.