(FILES) In this file photo taken on June 11, 2022 Gun control advocates participate in the "March for Our Lives" as they protest against gun violence during a rally near the Washington Monument on the National Mall in Washington, DC. - A committee of the US House of Representatives is set to vote next week for the first time in nearly 20 years on a bill that would ban assault weapons. "Our country has witnessed senseless killing after senseless killing and each time one fact has remained remarkably consistent -- the weapon of choice for mass slaughter is a high-powered assault weapon," Jerold Nadler, the chairman of the House Judiciary Committee, said in a statement. (Photo by SAUL LOEB / AFP)

Three people were shot dead at a campground in the US state of Iowa. Police officers discovered three bodies in the nature park near the small town of Maquoketa early Friday morning (local time), the state public safety agency said.

They later also found the body of the suspected shooter after the area had been searched for his mobile home. The 23-year-old was found dead west of the park – he probably took his own life, it said.

There was initially no information about the background to the crime. There was no longer any danger to the public.

The US has long struggled with massive levels of gun violence. According to the CDC, nearly 20,000 people were shot nationwide in 2020 – more than 50 a day.