New Delhi, Dec. 15 -- Security for Hanukkah events was ramped up across the biggest cities in the US on Sunday after a terrorist attack on a Jewish gathering in Sydney's Bondi Beach killed at least 15.

Cities across the country, from New York City in the east coast to Los Angeles and San Francisco in the west, ramped up security arrangements for Jewish sites of worship and Hanukkah events, condemning the attack.

The New York Police Department (NYPD) on Sunday greeted the Jewish community and marked the first day of Hanukkah, providing a threat assessment and an update on security arrangements.

"While there is currently no specific or credible threat to Hanukkah celebrations here, the NYPD will be out in full force at events and synagog...