The enormous power that fell into his hands was naturally looked upon with serious alarm by the Regent and her minister.

This ought to be a cause for serious alarm to everyone in Germany.

A solitary Paratwa amid a billion people is certainly no cause for serious alarm.

To some of my brethren in arms, this was matter of serious alarm.

A new, and very serious, alarm was growing in Margo's mind.

"When some individual parks his vehicle on the tracks, that is cause for serious, serious alarm."

As no one was injured, no serious alarms were raised.

It was hard to feel any serious alarm.

The accident caused by the tsunami at the Fukushima nuclear power station is a cause of serious alarm throughout the world.

For one thing, European leaders have yet to demonstrate serious alarm about the depreciation of their currencies.