In pictures: Loch Ness Monster hunters in the 1970s

The 90-minute film Loch Ness: They Created a Monster will be shown in UK cinemas from Friday

A new documentary explores efforts made in the 1970s to find the Loch Ness Monster.

The 90-minute film, Loch Ness: They Created a Monster, has been made by three-time Scottish Bafta-winner John MacLaverty.

It will be shown in UK cinemas from Friday, and includes archive footage and images.

During the 1970s, different groups of people sought to explain Nessie sightings.

The documentary features archive footage and photographs

Earlier this year, the biggest attempt in more than 50 years was made to solve the mystery.

About 200 volunteers kept a lookout for strange events from the shoreline, but spotted nothing unusual.

Observers on a boat using acoustic equipment reported four unidentified "gloops" but then realised their recording device was not plugged in.

Members of the Loch Ness Investigation pose for a picture at the loch

Loch Ness was monitored from shore for unusual activity

A flyer from the 1970s for a cruise on Loch Ness

The effort to explain Nessie in the 1970s also dipped beneath the loch's surface

Investigators' vehicles at Loch Ness