Authorities say a man who killed himself after firing shots at two locations in eastern Iowa was involved in a domestic dispute with his estranged wife.

Bettendorf police spokeswoman Lauran Haldeman said Tuesday that 40-year-old Robert L. Mayes II, of Coal Valley, Illinois, was looking for his wife when he fired shots Monday inside a Davenport building that houses a law firm.

Mayes then went to a second business in Bettendorf and fired more shots. Police say he was looking for a man at the second location, but they did not elaborate.

When officers spotted Mayes in the parking lot of the second business, he shot himself in the head.

Two people received minor injuries in the Davenport shooting, but they were not gunshot wounds. The case remains under investigation.