Deputy High Commissioner J P Singh was called to the Foreign Office where Pakistani side raised the 2007 Samjhauta train blast case, in which 68 people including several Pakistani nationals were killed, contending that there was undue delay in the trial.
The retaliatory act came shortly after Pakistan High Commissioner in New Delhi Abdul Basit was summoned by officiating Foreign Secretary Anil Wadhwa who lodged a strong protest against the court order to release Lakhvi, saying freeing him will pose a threat which "cannot be ignored".
The Pakistani side is understood to have told Singh that the Government cannot interfere in the judicial process in the Lakhvi's case.