Flag of the Islamic State of Iraq and the Levant | Tauseef Mustafa/AFP via Getty images Europol warns of more attacks in Europe Libya may become launching pad for new attacks, the European policing agency said.

Europe is likely to be a target of more terror attacks by groups or lone actors, Europol warned in a new report released in The Hague Friday.

Intelligence services expect several dozen people directed by ISIL are in the EU, ready to commit attacks, the agency said. The threat has increased as the extremist group loses control over territory in Iraq and Syria, and fighters make their way back to Europe, Europol said.

Future attacks could involve the use of homemade car bombs, according to the 14-page report on ISIL's potential methods and tactics compiled by Europol's European Counter Terrorism Center.

"Given the fact that the modi operandi used in Middle Eastern countries tend to be copied by terrorists operating in Europe ... it is conceivable that jihadist groups will use this means at some stage," the Continent's policing agency said, adding that extortion and kidnappings could also be employed in Europe.

Conflict-ridden Libya could become the new launching pad for terrorists seeking to carry out attacks in Europe and Northern Africa, the agency also warned in its report.

"Experts expect that [ISIL] will start planning and dispatching attacks from Libya if the current phase, in which they are primarily focused on taking territory and dispatching of local enemies, comes to an end," the agency said.

Increased cooperation between European police and security services and better exchange of data has been successful, but "the threat is still high" and "can only be tackled by even better collaboration," Europol Director Rob Wainright was quoted as saying in a press release.

According to the report, European security forces arrested 667 people for suspected terrorist activities in 2015.

ISIL is not the only organization with the capability to inflict terror in the EU, Europol warned, noting that groups affiliated with or inspired by Al Qaeda and the Nusra Front could also strike.