Ottawa police were called about a suspicious package and vehicle call Wednesday night in Lowertown.
Officers responded to Wurtenburg Street at 8:42 p.m. and remained on the scene for several hours.
Roads in the area had to be blocked off while crews looked into the issue.
Two residential buildings were evactuated as a precaution. OC Transpo busses provided shelter for those who were displaced.
Residents were allowed to return home shortly after midnight.
Officers continue to investigate the incident.
Anyone with information is being asked to call police or Crime Stoppers toll-free at 1-800-222-8477(TIPS) or by downloading the Ottawa Police app.