A man and woman from Ottawa have been charged after they allegedly drove their pickup truck into the Mississippi River, then spent more than 20 hours sitting inside it.

The pair drove into the river at around 9:45 a.m. on Aug. 18, after police received a report of "unwanted persons" at a cottage in the Lanark Highlands, according to an Ontario Provincial Police release.

The black Ford pickup truck remained in the river until around 6:15 a.m. on Friday, police said, when the two were arrested and taken into custody without incident.

The driver, a 29-year-old man, has been charged with obstructing a police officer, failing to comply with a recognizance, causing a disturbance, and mischief under $5,000.

He is being held in custody pending a bail hearing in Perth, Ont., on Aug. 23.

A 22-year-old woman has also been charged with obstructing justice. She was released and is expected to appear in Perth court on Aug. 26.

The Lanark Highlands are approximately 90 kilometres southwest of Ottawa.