Two teachers from Iowa were found dead in an apparent drowning in a swimming pool, officials said.

Police discovered the bodies of Kenneth Anderson, 57, and Mark Anderson, 60, in a backyard pool Monday evening at a Davenport home, news station WQAD reported. The men were not related.

Anderson was a social studies teacher at Bellevue High School, while Anderson taught science at North Scott High School before retiring in 2014 and becoming a substitute teacher, according to the Muscatine Journal.

The men had been housesitting for the property owner, who hadn’t heard from them for 24 hours and notified police, news station WXMI reported.

Authorities said they’re “following up” on the case, though they have ruled the deaths accidental drownings, the Muscatine Journal reported.

Neighbors said they were shocked by the news.

“Even if you slipped and fell and hit your head, that would be one person,” local shop owner Cindy Denike told WXMI.

“But is it likely two people would do that? I don’t know — it’s odd.”