TWENTY-SEVEN members of the Maute and Bandrang families have voluntarily submitted themselves for investigation, Justice Secretary Vitaliano Aguirre II said Wednesday.

In a press conference at the National Bureau of Investigation (NBI) in Manila, Aguirre said the Maute and Bandrang clan members surrendered to clear their names, after some of them are listed in the arrest order issued by Defense Secretary Delfin Lorenzana, martial law administrator.

The arrest order names 125 people, who President Rodrigo Duterte ordered detained for rebellion, for their alleged involvement in the ongoing gun battle with government troops in Marawi City, Lanao del Sur.

Among the surrenderees was a 10 and 15 years old, whose names are included in the arrest order dated May 29, said Aguirre.

Dalomilang Parahiman, legal counsel of the surrenderees, said the Mautes who sought his help are "law abiding citizens," not related to the Mautes perpetrating attacks against the military in Mindanao.

"Their only crime is that their surname is Maute," Parahiman said.

He said the group came from Mulondo, Lanao del Sur, "very far apart" from Butig where the lawless armed men are from.

"Most of these Mautes have been residing in Manila for more than 30 years," the lawyer added.

Aguirre said the group will spend the night at the NBI gym and will undergo booking procedure and medical examination Thursday morning.

They will further be investigated to determine whether they are the subject listed under the arrest order issued by Lorenzana.

"Sila'y voluntary na nag surrender. Hindi pa natin masasabi na sila ay under arrest. Kahit sila po ay included sa arrest order no. 1 yan po ay idedetermine pa ng NBI," Aguirre said.

President Rodrigo Duterte has declared a 60-day martial law in Mindanao following atrocities committed by the Islamic State-linked Maute group. (SunStar Philippines)