The dogs were pit bulls or pit bull mixes, said John Welsh, a spokesman for Riverside County Animal Services. They have been impounded. “Her injuries were described to the responding officer as severe,” Welsh said. The woman, who is not the owner of the dogs, was attacked on her property on Mitchell Road about 10 a.m. while doing laundry, Animal Services Sgt. Lesley Huennekens said. There were no witnesses. Investigators are still trying to determine why the attack happened. Animal Services has identified the dogs’ owner, Welsh said. The Riverside County Sheriff’s Department is also investigating the attack.