The multitude of beggars on the streets in parts of the country has been a source of concern to the authorities and members of the public.
Messrs Bello and Suleiman are standing trial on a 10-count charge bordering on money laundering brought against them by the anti-graft agency.
The police spokesman, Abubakar Aliyu, told journalists in Katsina about the attack on Thursday.
The botched case was the last serious attempt by the Nigerian government to impose accountability on organisations and individuals with suspected ties to the 2011 deal.
Aminu Jaji called on Muslims to use the Ramadan period to pray for Allah’s intervention in ending security challenges in the country.
He said the visit was aimed at enhancing relationship between the agencies and the ministry.
HEDA, in its petition, which was copied to the National Security Adviser, Nuhu Ribadu, also cited several corruption allegations against Mr Malami.
“They are notorious terrorists/bandits and arms smugglers who have been on the command’s wanted list.”
The EFCC arrested and detained Mr Mamman on Wednesday after he showed up for questioning at the anti-graft authority’s headquarters in Abuja.
The EFCC had in November of last year launched an investigation into the controversial $5.8bn Mambilla Hydro Electric Power project contract to Sunrise Power.