JAKARTA (AFP) - INDONESIAN police released on Tuesday a series of files from slain terror leader Noordin Mohammed Top's laptop showing detailed and chillingly nonchalant planning behind the July bombings in Jakarta.

Videos on the laptop seized in the Central Java raid this month that killed Noordin, 41, show suicide bombers and other militants discussing and making preparations for the July 17 twin suicide bombings, which killed seven people.

In one video, the two bombers, Dani Dwi Permana, 18, and Nana Ikhwan Maulana, 28, are seen doing stretches near an empty lot in front of the targeted JW Marriott and Ritz-Carlton hotels.

In another video, the bombers and hotel florist Ibrohim - who police say helped stage the attack from the inside - snack on biscuits and apples on the grass in front of the hotels.

A fourth militant still on the run from police, Syaifudin Jaelani says off camera: 'America, destroyed; Australia, destroyed; Indonesia, destroyed.'

In yet another clip, teenage bomber Dani is seen in front of the hotels saying: 'This is not suicide, this is a good deed.'

'We see how they are preparing themselves, how they have filmed their plans and their surveys of targets through their own eyes,' police spokesman Nanan Soekarna told reporters.

'We see how they really did prepare themselves, that this isn't just something the police have been saying.'

Other files found on Noordin's laptop included videos showing shopping and discussions of the impending attacks, as well as letters by Jaelani intended for his family that describe the operation's organisational structure.

Noordin, a Malaysian who headed a violent splinter faction of the radical Jemaah Islamiyah network, was killed along with three of his militants during a September 17 raid on a village house outside Solo city.

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