High alert for Americans after historic square comes to grip with mass shooting

The U.S. Consulate in Krakow, Poland, issued a security alert for Americans after a gunman opened fire in the city's historic Main Market Square, killing six people and wounding 15 others.

The U.S. Consulate in Krakow, Poland, warned Americans to avoid the city's historic Main Market Square after a deadly shooting left six people dead and 15 others wounded. The 24-year-old gunman reportedly drove into the popular tourist destination wearing military-style gear and a bulletproof vest before opening fire.