SEATTLE (AP) — The Seattle mayor has banned the police use of one type of tear gas as protests continue in the city and nationally over the killing of George Floyd. Mayor Jenny Durkan said in a news conference Friday afternoon that the ban on CS gas would last for 30 days. The move came hours after three civilian police watchdog groups urged city leaders to do so. Police Chief Carmen Best says officials will review police crowd control policies. Local health officials had also expressed concerns over the use of the gas and other respiratory irritants based on the potential to increase spread of the coronavirus.