Three parents contacted the ASA to say their children had been distressed by the ads/Getty Images

Children were left distressed after seeing ads for a horror film on YouTube, UK’s Advertising Standards Authority (ASA) has revealed.

Three parents contacted the ASA after their children saw ads for Insidious: The Last Key – rated 15 in the UK.

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One ad for the film was shown before videos of songs from Frozen, instructions for building a Lego fire station and a clip from the cartoon PJ Masks.

The ASA has upheld the complaints.

In a second ad, the ASA said a young woman was seen “lying on a floor immobile, bloodied and distressed while a humanoid creature crept towards her and then probed at her with claw-like fingers and pierced her skin”.