Houston, Texas, homeowner kills two men in self-defense after suspects impersonated police officers and opened fire on house during fake warrant service.

A Villanova University residence hall was evacuated on Sunday morning after authorities were notified of an unspecified threat, Delaware County authorities said. The threat was fake, police said. The incident comes days after school officials say a report about an active shooter on campus turned out to be a "cruel hoax.

Two Detroit officers and another person are recovering after a truck ran a red light and crashed into their police vehicle Saturday night, officials said.