12:42 p.m.: Police activity has cleared and normal Blue Line service is now resuming. Minor residual delays are to be expected until 1 p.m.

BLUE LINE: Trains resuming normal service with minor residual delays thru 1pm; earlier incident now clear. pic.twitter.com/ottbay2rzX

— LA Metro (@metrolosangeles) September 13, 2017

10:06 a.m., Update: 

BLUE LINE: SB trains turn back at Grand/LATTC, NB trains turn back at San Pedro. Supplementary buses in service btwn Washington-7th/Metro pic.twitter.com/3sy5OyG9zW

— LA Metro (@metrolosangeles) September 13, 2017

8:36 a.m.: For alternate service between South LA and downtown LA, consider Silver Line + Green Line to bypass delay area.

BLUE LINE UPDATE: Buses replace trains btwn Washington-7th/Metro due to ongoing police activity. Consider Silver Line for alternate service. pic.twitter.com/8i49xPk8M9

— LA Metro (@metrolosangeles) September 13, 2017