Police are looking for a 21-year-old man who allegedly threw a knife at another man after an argument over money in Aiea.

Police said the suspect and a 20-year-old man met in Aiea to settle a debt at about 5:40 p.m. yesterday. But after paying the money, the two men argued and the 20-year-old man ran away. The suspect allegedly threw a knife at the man that struck him in the back.

The suspect fled and the victim was taken to a hospital and found to have suffered a collapsed lung, police said.