Avigdor Liberman (C)
Avigdor Liberman (C)Yonatan Sindel/Flash90

The free world is under attack by Islamic terror, Israeli Defense Minister Avigdor Liberman said Friday, urging the West to unite against ISIS and similar terrorist groups.

Speaking just hours after a pair of attacks in Spain left 13 dead and more than 80 injured, Liberman said the time for Western unity had come.

"The terror attacks in Barcelona and Cambrils are yet another frightening attempt by radical Islam to harm the nations of the free world and to disrupt life in them. This terror must be defeated by the nations of the West, including Israel, working together closely with continued cooperation in security and intelligence operations."

This effort, Liberman continued, must go beyond the immediate counter-terror operations against imminent threats and include a broad campaign to uproot terrorism and defeat those encouraging attacks.

“We must all fight with determination against not only those who commit terror attacks, but also those who send them, those who fund them, and those who inspire them.”

“I send my condolences to the families of the murdered, and wish those injured a quick recovery from their injuries. Our hearts are with Spain and its citizens during this difficult time."

Late Thursday night, other Israeli leaders responded to the attacks, offering their condolences and condemning the terrorists responsible.

"Israel strongly condemns the terrorist attack in Barcelona,” said Prime Minister Binyamin Netanyahu. “On behalf of the citizens of Israel, I send condolences to the families of those who were killed and wishes for a quick recovery to the injured. This evening we again saw that terror strikes everywhere; the civilized world must fight it together in order to defeat it," he said.

Former Minister Gideon Sa'ar expressed his deep sorrow over the attack, saying, "Our hearts are with the families of the murdered, with the victims and with the residents of Barcelona, in light of the horrific massacre. The free world must unite for a joint and uncompromising war against terrorism."