A man who grabbed a knife to try to get his two young children out of a locked car died when he fell on the blade, Charlotte police said.

The Charlotte Observer reported that 22-year-old Miguel Angel Rivera Lemus died Sunday afternoon at Carolinas Medical Center after being stabbed in the chest.

Charlotte-Mecklenburg police were investigating but said Lemus' death appears to have been an accident.

Lemus and his wife had dropped by their apartment briefly before planning an errand when they realized they had locked their children and keys in the car, authorities said.

The woman searched for spare keys and Lemus grabbed a large butcher knife he hoped to use to pry open a window, police said. Lemus fell down six stairs and landed on the knife, police said.

The woman got the children out with the spare keys.