A suspicious package has closed Ninth Street and Pennsylvania Avenue on Monday morning in Northwest Washington.

P6: Due to police activity, buses to Anacostia are detouring btwn 11th St & E St NW and btwn Pennsylvania & 7th St NW. — Metrobus Info (@Metrobusinfo) September 19, 2016

It is not clear how long the roads will be closed. Drivers are advised to avoid the area. The call came in about 8:49 a.m., D.C. police said.

@WTOPtraffic both lanes of Pennsylvania Ave NW closed at 7th St NW for several blocks up to 10th or 11th St pic.twitter.com/l9ojaO9iRt — Michele Streeter (@mb_streeter) September 19, 2016

This follows an earlier incident involving a suspicious package in Northwest Washington. That incident began about 11:30 p.m. Sunday night, when a suspicious package was reported near 18th and E streets NW. That incident was reportedly cleared by early Monday.