Singh later said that he has no complaint with the minister after his resignation.
He said the Superintendent of Police met him in the evening and has assured full security.
Similar assurance has been given also by senior officials in Lucknow, he added.
The CMO said he was mentally upset after the incident and therefore had gone to Lucknow.
The CMO was "untraceable" after allegedly being abducted by the minister on Monday night and initially even his family members claimed he could not be contacted as his mobile phones were swtiched off.
Home department officials had in Lucknow yesterday said efforts were on to contact the CMO Singh for his statement on reports regarding his alleged abduction by a state minister.
"We have not been able to contact him till now and as per the reports received from Gonda he is on leave since Tuesday," Secretary (Home) Kamal Saxena had said.
While the state government ordered an inquiry into the incident, the minister in question Vinod Kumar Singh sent his resignation to Chief Minister Akhilesh Yadav today and alleged a conspiracy on the part of the district level officers to malign his image.
Meanwhile, 19 people were arrested in connection with the violent protest at the CMO office by supporters of Vinod Kumar Singh earlier in the day.