Pete Doherty in Thai holiday drugs storm

Pete Doherty's turbulent relationship with Kate Moss was under strain today as pictures emerged of the singer appearing to inject drugs during the couple's Thailand 'honeymoon'.

Mobile phone video footage taken just two days after he and Kate celebrated a Buddhist blessing on the island of Phuket shows a bare-chested Doherty chatting to the model on a mobile phone while he shoots up.

The bed he sits on appears to be strewn with drugs paraphernalia — a spoon, syringes and lots of banknotes.

Backpacker Jess Lea, who recorded the scenes in her hostel room after inviting Doherty to join her and two friends for drinks, said she had watched the Babyshambles star 'inject cocaine into his right arm three times between 1.30am and 4am'.

She said Doherty, who had abandoned his girlfriend in their exclusive resort, borrowed her mobile to call Kate.

Miss Lea, 21, said: "Pete kept telling us Kate was paranoid and wanted to know where he was. She did seem quite pissed off, with him constantly pleading, 'What's wrong? I love you'.

"After one conversation his mood changed. He was quite upset."

The Australian said she eventually panicked about Doherty using drugs in her room: "When we got him downstairs, he asked the man on reception where he could score some heroin.

"Then he went up to every taxi driver asking if they could score him some drugs."

The next day a furious Kate ordered him back to London.

The couple are understood to be attending a London clinic to deal with relationship problems and the singer's addictions.