Police will close some roads around the Arboretum for a few hours this afternoon, as investigations continue into the alleged attempted murder of three police officers.

Specialist technical investigators will be conducting measurements and scanning of the scene to assist in the investigation into the incident.

Some off ramps from the Tuggeranong Parkway, and roads around Lady Denman Drive will be closed between midday and 2pm, and drivers are being urged to exercise care during this times.