So sensitive was the news that the authorities kept quiet about it for more than three months.

Most authorities kept files well away from parents and children.

The federal authorities have kept few secrets to this point.

There's no point having laws if the authorities keep on ignoring them.

The authority is keeping a close watch on it with samples every day.

King said the authorities cannot keep intervening in the commercial paper market.

He says it's his way of helping the local authorities keep the home front clean.

The authority will keep a second 20,000-square-foot building for offices.

The Russian authorities knew the real background of the case, but kept it on the news for weeks.

Even so, the authorities would keep an eye on them.