Multiple shots have been fired at the National WarMemorial in Ottawa, just steps from the nation's parliament.Witnesses reported seeing a man running toward the government buildings,which have been placed on lockdown.A soldier has been wounded in the attack, Canadian media report.The incident comes amid the nation's raising of its terror threat level fromlow to medium, after a Muslim convert was killed by Quebec police after hittingtwo soldiers with his car."Shots fired at War Memorial at 9:52am today; one person injured," OttawaPolice tweeted on Wednesday.A government official earlier said the raised threat level was in response toan increase in online "general chatter" from radical groups including IslamicState and al-Qaeda.Ministry spokesman Jean-Christophe de Le Rue said on Tuesday that theincreased level "means that intelligence has indicated that an individual orgroup within Canada or abroad has the intent and capability to commit an act ofterrorism".