"Those who normalize relations with Israel bear part of the responsibility for Israeli aggression against the Palestinian people," Hazem Qassem, Hamas spokesman, said in a statement.

All attempts to "integrate" Israel into the Arab region will fail, he added, noting Israel will always remain the "central enemy" of all Arab peoples.

A day earlier, Israeli media reported that Israel would send an official delegation to a maritime security conference in Bahrain on Sunday to discuss Iranian threats to naval security in the region.

Israeli Public Radio confirmed that the conference, which will be attended by dozens of countries, is an initiative backed by U.S. President Donald Trump.

According to the radio, the conference is a continuation of the Warsaw security summit which was held earlier this year and focused on Middle East stability.

The U.S. government organized an international conference on Feb. 13 and 14, which focused on the peace in the Middle East region with the participation of Israel and Arab countries. Some 80 countries, including Israel and a number of Arab countries, participated in the conference.

In the Arab region, Israel has formal diplomatic relations with Egypt and Jordan only. However, Israeli Prime Minister Benjamin Netanyahu said on several occasions that his country has improved ties with some Arab and Islamic countries.