Palestinian sources claimed in "Al-Quds Al-Arabi," a Palestinian newspaper published in London, that Hamas received definite information about the IDF and Mossad's intention to carry out targeted assassinations of the organization's senior officials. Among the officials mentioned were Khaled Mashal, Khalil al-Hayya and Zaher Jabarin who are staying in Qatar, among other locations. According to their claims, "Hamas took extraordinary security measures" following alerts from friendly official sources who allegedly "monitored the activities of Mossad agents."