81.   Police evacuated Aintree racecourse and abandoned the entire Grand National meet Saturday after receiving a bomb warning and then carrying out a controlled explosion of a suspect device.

82.   Police carried out a controlled explosion on a suspect package, but said it carried no explosives.

83.   Police conducted a controlled explosion and found the homemade bomb contained nails, said Chong.

84.   Police inspector Michael Heath said a controlled explosion was carried out by the bomb squad, but it was not immediately clear whether any device had been planted.

85.   Police later carried out a controlled explosion of a second car they suspected of carrying explosives.

86.   Police officers crouched low and covered their ears, in case the controlled explosion set off explosives inside.

87.   Police said they were attempting to carry out a controlled explosion to defuse the bomb when it exploded outside the BBC building in west London.

88.   Police said the controlled explosion, which could be heard for miles, broke a few windows in surrounding homes, but caused no other damage.

89.   Police said they planned a controlled explosion.

90.   Police there carried out several controlled explosions earlier in the week.