Munich police warned people to avoid public places Friday as they hunted for the shooter or shooters who opened fire at a shopping mall, killing six people and wounding others in a rampage described as "suspected terrorism," police and media reports said, according to AP. "At the moment no culprit has been arrested," police in the Bavarian capital said on social media. "The search is taking place at high speed." The city of Munich sent a smartphone alert telling people to stay indoors and German rail company Deutsche Bahn stopped train traffic to Munich's main station. Police said witnesses reported seeing three people with firearms near the Olympia Einkaufszentrum mall.