Pakistani fast bowler Mohammad Asif has apologised to his home nation after spending time in a Dubai jail on suspicion of carrying illegal drugs.

Dubai authorities decided not to prosecute and allowed Asif to fly back to Lahore earlier.

"I am ashamed of what happened in Dubai and I apologise to the nation," he told reporters on his return, before saying he was innocent.

He was detained at Dubai airport on June 1 on his way to Pakistan from India.

He was accused of possessing a small amount of opium, but reports said Dubai's public prosecutor decided the case was not significant enough to pursue.