Sandy hammered the eastern United States early Tuesday, flooding much of New York City, hitting several states with heavy winds and torrential rain and leaving at least 14 people dead.

Hafiz Mohammad Saeed, said his organisation was ready to offer every possible help to the storm-hit American people.

"Jamaat-ud-Dawa is ready to send its volunteers, doctors, food, medicines and other relief items on humanitarian grounds if the US government allows us," Saeed said in a statement.

"America may have any opinion about us, it may fix bounties on our heads but as followers of the teachings of the Prophet Mohammed(PBUH), we feel it is our Islamic duty to help people trapped in a catastrophe."

Saeed's statement said the charity had carried out relief work in Indonesiaand Sri Lanka after the Indian Ocean tsunami in December 2004.

Saeed's charity has long denied terror accusations and is known around Pakistan for its relief work in the wake of the devastating Kashmir earthquake of 2005 and the floods of 2010, which were the worst in the country's history.