What We're Following This Afternoon

L.A. shuts schools: The second-largest public school system in the nation shut down after officials received a threat against an unspecified number of its more than 900 campuses. In New York, police said a “specific” threat was made against the city’s schools this morning, but officials there didn’t think it was credible.

William Porter trial: The jury is deliberating in the case against the Baltimore police officer charged in connection with the death of Freddie Gray earlier this year. Earlier today, Porter’s defense asked for a mistrial based on a letter sent by the city’s schools chief that warned students from leaving class to demonstrate against a verdict. The judge denied that motion.

Talks on Yemen: Representatives of the government, the Houthi rebels, and others are meeting in Switzerland after a cease-fire went into effect. The nearly nine-month conflict has claimed nearly 6,000 lives.

Our headlines from the morning are here.