The South African city of Cape Town says there has been growing tension and one arrest at a source of natural spring water where residents have converged because of a severe drought.

Authorities say they might have to turn off most city taps in mid-April if residents don't save enough water, a scenario that has raised concerns about security.

The city says police and the military would help secure water collection sites if the tap closure occurs.

The city says it is taking over management of the Newlands neighborhood site because noise and traffic congestion by people collecting water around the clock is disturbing neighbors and an adjacent home for the elderly. The city says police detained one person earlier this week after a fight broke out.