Two South Korean tourists were killed when their wives’ golf cart rammed into theirs, propelling them into a muddy river, where they drowned.

The couples were on vacation in Thailand for Christmas and went golfing at the course in the Phitsanulok province Wednesday.

They were on a ferry crossing a river that runs through the course when their wives’ vehicle hit theirs. The impact threw them all into the muddy waters of the Nan river, Lt. Col. Suwat Suawatmontri of the district police told Agence France-Presse.

The women were quickly rescued by fishermen, but the men, Jun Yong Sung, 68, and Jaeoong Ha, 76, couldn’t be found.

More than 50 rescue workers from the military and police looked for the missing men. One of their bodies was found Wednesday night about 1.2 miles from the accident scene, while the other was discovered by villagers Thursday morning, “floating near temple,” Suwat said.

“Their wives said both were able to swim but I think the cause of drowning was the strong undercurrent,” Suwat said.