Las Vegas Metro Police received an unusual call Thursday morning -- two chimpanzees were loose and attacking cars in the northwest part of the city.

Police were forced to fatally shoot one chimp that aggressively approached officers and bystanders, said Officer Laura Meltzer.

The second animal was tranquilized and secured by animal control officers, she said.

It was not immediately known where the chimps came from or to whom they belong, Meltzer said.