Italy's police chief says Italy is "more exposed" to the threat of international terrorism than in the past because of conflicts in nearby Libya and the risk of lone-wolf fighters.

Chief Alessandro Pansa told a parliamentary committee Wednesday that new anti-terrorism measures approved by the government, which allow police to mount surveillance operations on suspected jihadis, were "indispensable."

The government passed the decree in after the Paris terrorist attacks. The measures aim to crack down on foreign fighters, providing for stiffer jail terms for recruits and "lone-wolf" terrorists.

Pansa stressed there were no imminent threats but there are "risk factors that are more noticeable compared to the past."

Italy has raised the alarm about Libya's instability given that Islamic State-affiliated militants have vowed to conquer Rome.