CHARLOTTE, N.C. (AP) — Four law enforcement officers in North Carolina who were killed while trying to capture a man immediately faced gunfire as they approached, unable to withstand shots from upstairs in a house, authorities said Tuesday.

Still reeling from Monday's attack — the deadliest against U.S. law enforcement officers since 2016 — investigators in Charlotte said they weren't sure whether there was a second shooter and that more work was needed to determine what happened.

"Charlotte isn't going to be the last place that this happens," Mayor Vi Lyles said, "but Charlotte will be the pl...