Jonathan offered help during his meeting with Deputy Secretary-General Dr Asha-Rose Migiro, who visited him at his Presidential Villa here.
23 persons were killed and over 81 others injured on August 26 when a suicide bomber rammed his Honda SUV into the ground floor of the building in the country's capital city of Abuja.
Migido told Jonathan that she was in the country to assess the damage, which she said would not deter the UN from their humanitarian programme.
An al-Qaeda linked radical Islamist sect 'Boko Haram' nhas claimed responsibility for the bombing.
The sect had also claimed responsibility for several killings and bombings in Nigeria including a disputed suicide attack at Nigeria's police headquarters in June.
Published 29 August 2011, 02:39 IST