About four hours after a police standoff ended in Gatineau on Wednesday, officers were called to the same area for reports of gunshots.
Police officers patrolling the area of Promenade du Portage and Leduc Street reported hearing three or four shots just before midnight.
No one was hurt.
Officers quickly arrested a 27-year-old Gatineau man and seized a handgun.
The reason for the shooting is unknown so far. The man was expected to be interviewed on Thursday morning.
Man plunges truck into Ottawa River
It was a busy night for police. Just before 1 a.m., a man lost control of his truck near the Tecumseh golf course and plunged into the Ottawa River.
He managed to swim to shore and call 911, police said.
The 33-year-old man from Val-des-Monts was taken to hospital to be treated for signs of hypothermia.
Alcohol is not believed to be a factor but fatigue could be, police said.