Three more activists, including a trainer, of banned Students Islamic Movements of India were arrested by the Madhya Pradesh police on Wednesday.

"The trio identified as Amaan, Zakir Lala and Irfan Chhipa, were arrested from different places on Wednesday morning," Superintendent of Police (Indore) Anshuman Singh Yadav told PTI in Indore, adding that they belong to Nihalpura and Juna Risala areas of the city.

Yadav said Amaan was engaged in training SIMI activists, while Zakir had been the local chief of the banned outfit.

Chhipa was held for helping SIMI and carrying out other illegal activities. Earlier, he was arrested in 2006 on the same grounds, he said.

During interrogation, all the three confessed to have been working to strengthen the organisation at the behest of top SIMI leaders, he said.

More arrests were possible in the coming days in the wake of revelations made by the arrested activists, Yadav added.

Meanwhile, police have filed cases against them for involvement in illegal activities and for helping anti-national elements.

With Wednesday's arrest, 24 SIMI activists have been held within a week.

For the first time on March 27, police had arrested 13 SIMI activists, including its Madhya Pradesh Chief Safdar Nagori, who have been remanded to police custody till April 11.

Following this operation, seven more were arrested on March 31 and one was held on Tuesday.