TORONTO - An all-party probe into Ontario's troubled air ambulance service has wrapped up its work for the summer, but some say more questions need to be answered.

The legislative committee has heard from dozens of witnesses, including Ontario's health minister and the service's former CEO Chris Mazza, the mastermind behind Ornge.

But the opposition parties want to have more public hearings in the fall to hear from more witnesses and delve deeper into Ornge's questionable business dealings.

It's not yet clear whether those hearings will happen.

That decision won't be made until the provincial legislative session resumes in the fall.

In the meantime, all three parties are gearing up for two byelections, which the governing Liberals hope will hand them a majority government.