"A Iqbal, Fakar A Alam and Malik Mohammad were served the notices last night and sent to Amritsar from there they will be sent to Pakistan," CID sources said.
A CID personnel is accompanying them to the border, they added.
The middle-aged Pakistani nationals, all businessmen, were caught by the intelligence unit in Dargah area in Ajmer on Monday where they had gone to visit the Dargah of Sufi saint Khawaja Moinuddin Chisti.
They had visa for Delhi, Amritsar and Jaipur only but visited Ajmer without visa so they were detained and will now be blacklisted, they added.
