Police Lt. Brian Wendling says six people in two canoes were cited for trespassing Friday after they left the concrete-lined channel in Studio City.
He says the Manitoba band took to the water in nearby Van Nuys with their instruments and a camcorder, apparently to make a music video.
Wendling says they left the 3-foot-deep river after one rickety canoe began leaking, and firefighters and police helped them out.
They were cited for trespassing and could be charged for the emergency response.
A website for a Manitoba band called Twin says the group planned a journey down the river.
The river can become a death trap when it swells with runoff.
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