Local 87, the union representing 6,000 janitors in the private sector, said federal agents went to multiple downtown office buildings late Friday afternoon, but that building security kept them from entering.

SAN FRANCISCO (KGO) -- As we've been telling you, San Francisco continues to navigate a difficult recovery downtown. Though crime is down, the tents are pretty much gone and some companies are now requiring employees to come back in person five days a week, the area has yet to bounce back.