David Tennant and Olivia Colman are to reprise their roles in a third season of the hit drama Broadchurch, ITV has announced.

The murder mystery, which came to the end of its second season last night, attracted an average audience of more than nine million viewers across the two series.

No details about the other cast members who will be joining Tennant's DI Alec Hardy and Colman's DS Ellie Miller have been revealed and filming dates will be confirmed at a later date, the broadcaster said.

Creator and writer Chris Chibnall said: "We've been overwhelmed that nine million people every week have continued to join us on the twists and turns of Broadchurch. This third chapter has been a glint in my eye for a long time and I'm thrilled to be writing these characters once again."

ITV's director of drama Steve November said: "Chris Chibnall knows exactly how to keep viewers guessing and I'm delighted that he is going to take the story on to the next stage."