"The tunnel is about 12 meters (39 ft) long and we suspect it took more than a week to build", the head of Kerobokan prison Tony Nainggolan said, adding that police believed the men were still in Bali and not far from the prison.
He is among four foreign prisoners who allegedly made a brazen escape on Monday sometime after 6.30am, police said.
Tee was arrested in Jan 2015 at the Hotel Amaris in Denpasar shortly after landing in Bali on a flight from Malaysia.
Davidson is serving a one-year sentence for an immigration offense, while Iliev is serving a seven-year sentence for money laundering and another offense. Said and King are serving 14 and seven years, respectively, for drug offenses.
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But Katie Piper is expanding her brood, as she confirmed she is pregnant with her second child on Sunday. Katie has been inundated with congratulatory messages since making the announcement.
Prabawa said police have distributed pictures of the escaped inmates to police stations across Bali.
Indonesian prisons are frequently overcrowded and a war on drugs being led by the government of President Joko Widodo has triggered a spike in the number of convicted drug offenders, stretching an already overwhelmed jail system.
Last week, dozens of inmates escaped from an overcrowded prison in western Indonesia after floods caused a wall to collapse.
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