LAKE LEWISVILLE (CBSDFW.COM) – The bodies of two teenage brothers were recovered from Lake Lewisville Sunday evening.

Lake Lewsville game warden Darren Blackeberby says the two teenagers were swimming in the lake about 50 yards off the bank. They were in water that was about five to six feet deep.

Their family was reportedly on the bank but did not see the two go under.

Investigators are not sure what caused the drowning at this time.