Pakistan on Saturday summoned the Indian Deputy High Commissioner to express concern over the acquittal of RSS leader Swami Aseemanand in the 2007 Ajmer Sharif blast case.

J.P. Singh was summoned on Friday night, Dawn news reported.

On Wednesday, a special court acquitted Swami Aseemanand and six others in the 2007 Ajmer Dargah blast case, giving them the "benefit of doubt". The bombing killed three people and left at least 15 others injured.

Aseemanand is also accused of masterminding the deadly 2007 Samjhota Express bombing that killed 68 people, most of them Pakistanis.

"Swami Aseemanand had publicly confessed that he was the 'mastermind' of Samjhota Express terrorist attack of February 2007," the statement released by the Foreign Office said on Friday.

The statement added that Pakistan "expects India to take steps to bring to justice all those involved in the heinous act of Samjhota Express terrorist attack".