More than 50 interviews have been conducted and more than 5,500 photos taken in the RCMP investigation of the Humboldt Broncos bus crash.

Investigators have even used drones and 3D technology to gather evidence and analyze the scene, Assistant Commissioner Curtis Zablocki told media Thursday morning in an update on the case.

“There is still a lot of work to be done interpreting and analyzing all of the information gathered.”

Mechanical inspections of both vehicles have been completed, and investigators are awaiting results. Engine control modules from both the transport truck and the bus have been sent to California for analysis.

Investigators are reviewing documents from the vehicles which log hours of work, rest time, brake checks and compliance with safety standards.

On Thursday investigators closed down the intersection of Highways 35 and 335 for further analysis and a reconstruction of the crash.

“Complex collision reconstruction investigations take time and are often measured in weeks and months, rather than days,” Zablocki said.