"Israel expresses deep shock at the crime against the girls," Prime Minister Benjamin Netanyahu's office quoted him as telling Nigerian President Goodluck Jonathan by phone. "We are ready to help in finding the girls and fighting the cruel terrorism inflicted on you."
The statement did not elaborate on how Israel might enlist in the search, with which British and U.S. experts are also helping. A spokesman for Israel's Foreign Ministry said he knew of no cooperation efforts under way.
Israel has defence ties with Nigeria, and has provided it in the past with surveillance drones.
Last September, Israel was among several countries that sent advisers to Kenya to assist in a stand-off with Islamist gunmen who attacked a mall in Nairobi.