The two unrelated incidents occurred within 15 minutes of each other.

The whole tragedy occurred within two minutes, and neither of the three spoke after he was shot.

The shootings, which occurred within 90 minutes, did not appear to be related, the police said, although both were still under investigation last night.

If a color change does not occur within three minutes, the result is negative.

Death can occur rapidly, within 30 to 120 minutes in severe cases of envenomation.

Reactions, if any, occur within 10 to 15 minutes and these results can then be analyzed.

No lives, he said, were at risk in this explosion, which would occur within five minutes of their departure.

Although death usually occurs within ten minutes of the beginning of the injection process, some have been known to take longer.

This should occur within 2 to 15 minutes in most cases.

The increase occurs within 30 minutes and lasts for at least 90 minutes.