NEW YORK (CBSNewYork/AP) — The State Department has issued a worldwide travel alert for Americans.

Authorities say U.S. citizens traveling abroad should be extra vigilant for possible threats in public venues.

The move comes following the deadly hostage attack in Australia earlier this week in which a gunman took 17 people hostage at a cafe.

The siege came to an end after 16 hours in a barrage of gunfire that killed two hostages and the Iranian-born gunman.

The alert says an analysis of past attacks strongly suggests that terrorists are focued on hotels, shopping areas, places of worship and schools.

The travel alert lasts into March.

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