SAN MATEO COUNTY, CA — An Oregon man was locked up in the Redwood City jail on Monday on suspicion of attempted murder after stabbing his elderly father over the weekend, according to police and jail reports.

The attack was reported around 2 a.m. Saturday at a home in the 1700 block of Terrace Drive, which is near the area of Alameda de las Pulgas and Ralston Avenue, according to Belmont Police Capt. Patrick Halleran.

"Belmont Police were notified by an area hospital that an elderly man with stab wounds had been brought into their emergency department," Halleran said in a news release. "The victim told officers that... he was home asleep, when he was attacked by his 61-year-old son without warning."