Scenes from the field

OTTAWA, CANADA: A woman walks near the National War Memorial in the nation's capital. Yesterday a gunman opened fire there, killing Canadian army reservist, Cpl. Nathan Cirillo. The gunman then entered the nearby main Parliament building, where witnesses say shots were fired -- many by security officers -- before he was shot dead, authorities said. The gunman was Quebec native Michael Zehaf-Bibeau, a convert to Islam, U.S. officials told CNN, citing information given to them by Canadian authorities. Canadian investigators haven't provided any possible motives for the shooting. A U.S. law enforcement official told CNN that a connection to terrorism hasn't been ruled out. The shootings left government workers and others locked inside offices for a large portion of the day while police searched buildings to ensure that no other culprit was loose. Wednesday's deadly attack was the second on Canadian soldiers this week. On Monday, a convert to Islam who Canadian authorities said was "radicalized" hit two soldiers with a car in Quebec, killing one of them. Police later killed the man. Photo by CNN's Khalil Abdallah, October 23. Follow Khalil (<a href='http://instagram.com/madcameraman' target='_blank'>@madcameraman</a>) and other CNNers along on Instagram at <a href='http://instagram.com/cnn' target='_blank'>instagram.com/cnn</a>.

OTTAWA, CANADA: A woman walks near the National War Memorial in the nation's capital. Yesterday a gunman opened fire there, killing Canadian army reservist, Cpl. Nathan Cirillo. The gunman then entered the nearby main Parliament building, where witnesses say shots were fired -- many by security officers -- before he was shot dead, authorities said. The gunman was Quebec native Michael Zehaf-Bibeau, a convert to Islam, U.S. officials told CNN, citing information given to them by Canadian authorities. Canadian investigators haven't provided any possible motives for the shooting. A U.S. law enforcement official told CNN that a connection to terrorism hasn't been ruled out. The shootings left government workers and others locked inside offices for a large portion of the day while police searched buildings to ensure that no other culprit was loose. Wednesday's deadly attack was the second on Canadian soldiers this week. On Monday, a convert to Islam who Canadian authorities said was "radicalized" hit two soldiers with a car in Quebec, killing one of them. Police later killed the man. Photo by CNN's Khalil Abdallah, October 23. Follow Khalil (@madcameraman) and other CNNers along on Instagram at instagram.com/cnn.