Five people were shot at a business park in Harford County, Maryland, police say. Three died; two were taken to the hospital in critical condition.
Police detained one man at the scene. They say the incident is not terror-related.
Investigators still haven't determined a clear motive for the attack, which left 58 people dead and hundreds injured.
Officials say 12 of the firearms found in the gunman's Mandalay Bay hotel room were equipped with what's called a bump stock or a bump-fire stock.
Police say the gunman was perched on the 32nd floor of the Mandalay Bay Resort and Casino.
Spanish security forces used rubber bullets and other means to subdue Catalans headed to the polls.
After seven rockfalls Wednesday, another, bigger rockfall occurred Thursday.
The van attack that killed at least 13 and wounded more than 50 is being treated as a terror attack, police say.
The Red Cross says more than 300 people were killed near the city of Freetown when a rain-soaked hillside collapsed early Monday local time.
Officials told reporters the attack started Sunday night in the country's capital and lasted several hours.
Egypt's railway authority said a train traveling from Cairo to Alexandria slammed into the back end of another.
The powerful quake struck Jiuzhaigou county in Sichuan province Tuesday night. The area is home to one of China's most famous national parks.