The Police have arrested Mohammed Aliyar, a close associate and a financial controller of National Thowheed Jamaath leader Zaharan Hasheem.
Police Media Spokesman SP Ruwan Gunasekera sad the suspect was arrested in Kattankudy, this evening.
The 60 year old man is believed to be a strong supporter of Hasheem who masterminded the Easter Sunday explosions.
He is currently being detained and questioned by the Police.