"Hizbullah charges Israel time and again with Imad Mugniyah's death, a fact that may boost the threat of Hizbullah terror threats on Israeli targets abroad," the warning said.
The CTB's travel advisory advised Israelis abroad to avoid attending large gatherings, and has upped its abduction warning, especially those who have business connections with Arab and Muslim businesspeople.
According to the advisory, Israelis should reject any tempting or unexpected offer abroad, and should also refuse unexpected gifts or invitations for free outings from suspicious or unfamiliar parties. In addition, Israelis are urged to refuse unexpected meetings at remote or isolated places, particularly after dark, and to refrain from attending unexpected meetings alone.
Security officials said the latest warning is highly unusual.
'Ready for war'
The warning also advises Israelis overseas to be alert to unusual incidents, refrain from staying in Arab or Muslims countries that are the subject of a travel advisory, and conduct themselves cautiously at all times.
The warning advises Israelis to refrain from visiting any Arab country, with the exception of Mauritania and the Comoros. The CTB stressed that the advisory also applies to Muslim countries such as Iran, Afghanistan, Pakistan, Malaysia, Indonesia, and Bangladesh. Other areas that should be avoided include areas in Thailand, Nigeria, India, and the Philippines.
Earlier Thursday, Hizbullah Secretary General Hassan Nasrallah railed against Israel saying it had made a mistake by assassinating Mugniyah just as it had made a mistake by killing his predecessor, Abbas Musawi. He vowed to retaliate against Israeli targets abroad after accusing Israel of killing his former chief military commander.
The Hizbullah chief said his group was ready for "open war" with Israel if the Jewish state wanted it.