A 39-year-old woman who died Saturday in a Maryland kayaking accident was a Secret Service agent, authorities said.

At about 3:30 p.m. Saturday, the woman’s kayak overturned near Horn Point in Anne Arundel County, according to the Maryland Natural Resources Police. Another kayaker tried to help her right the boat, authorities said, but the woman drowned.

In a statement Monday, a U.S. Secret Service spokesman identified the woman as Special Agent Stephanie Hancock, who served on the presidential protective detail and had been with the agency since 2007.

“Our condolences, as well as our thoughts and prayers, are with the family,” the statement said.

The deadly weekend on Maryland waterways also left three people missing after separate marine incidents, according to the Maryland Natural Resources Police.

Officials said Monday they are still searching for a mechanic, Allan Van Dyke, who went missing Saturday in Curtis Bay.

Two other people who went missing while crabbing in Stoney Creek the same day were found dead Monday, officials said. They were identified as Mark Vetock, 27, from Glen Burnie, Md., and Tevin Calhoun, 27, from Pasadena, Md.