The Rajasthan Anti-Terrorism Squad said no fresh arrest was made in connection with the 2007 Ajmer Dargah blast on Sunday.
Denying reports that one suspect was arrested from Dhar district of Madya Pradesh, a senior ATS officer said no one was taken into its custody on Sunday.
The officer said three suspects who were arrested last week are being interrogated.
The ATS had arrested Devendra Gupta and Chandrashekhar and detained Vishnu Kumar Patidar.
Chandrashekhar, suspected to have links with Hindu outfits, was arrested on April 30 from Madhya Pradesh while Patidar was apprehended yesterday from Shajapur in the same state. Gupta was arrested last week from Ajmer.
Two pilgrims were killed and nine others, including a child, were injured when a crude bomb went off at the sufi shrine of Khawaja Moinuddhin Chishti in Ajmer during Ramzan fast-breaking.