FERGUSON, Mo. — Activists, authorities and the family of Michael Brown called for calm as a grand jury drew closer to an announcement in the Ferguson police shooting. But it was unclear whether the panel was still at work or when it would render a decision.

Earlier Friday, a spokesman for St. Louis County Prosecutor Bob McCulloch told reporters that jurors were reviewing evidence as they weigh whether to indict officer Darren Wilson.

Five hours later, Ed Magee declined to say whether the panel was still meeting.

The time, date and place for a news conference announcing the decision has not been decided, Magee said.

Wilson, 28, reportedly told the grand jury that he feared for his life on Aug. 9 as Brown, who was 6-foot-4 and nearly 300 pounds, came at him. Witnesses said Brown was trying to surrender and had his hands up.