The Latest: US official expresses concern over Venezuela

CARACAS, Venezuela (AP) — The latest on opposition and pro-government marches in Venezuela (all times local):
5 p.m.
The U.S. secretary of state says the Trump administration is concerned about the political turmoil in Venezuela and feels socialist President Nicolas Maduro is trying to squash the voice of his opponents.
Secretary of State Rex Tillerson tells reporters at the State Department that the U.S. is “concerned that the government of Maduro is violating its own constitution