Mr Surpapong, who supervises Capo, was referring to the arrest of three navy officers in possession of weapons and VIP cards issued by Students and People Network for Thailand’s Reform (SPNTR) at a checkpoint on Krung Kasem road.
The three officers were taken to Nang Loeng police station for questioning.
Mr Surapong said it was learned from the commander of the Naval Special Warfare Command (NSWC) that the three men were moonlighting as guards for the anti-government protesters.
Gen Nipat had been instructed to investigate, he said.
It was earlier reported that Rear Adm Winai Klomin, commander of the NSWC, went to Nang Loeng police station to show police a document confirming that the three men were on assignment, investigating a drug case. The weapons were for self defence and the VIP passes to facilitate their travel.
Mr Surapong also said the closure of various government offices by protesters led by the People's Democratic Reform Commission (PDRC) had affected the people seeking government services.
For example, the occupation of the Consular Affairs Department on Chaeng Wattana road by Phra Phuttha Issara had resulted in about 16,000 people not being able to apply for passports. An average of 4,000 people a day turn up at the department to make application, he said.
"Therefore, Mr Suthep should tell Phra Phuttha Issara to immediately lead the protesters away from the Consular Affairs Department because they have caused trouble fora large number of people. Moreover, they have also caused traffic congestion," Mr Surapong said.
Mr Surapong said in a video briefing by the national police chief he was informed that a Capo team led by caretaker Labour Minister Chalerm Yubamrung, coordinating with police, had reported that Mr Suthep usually travelled in a convoy of eight vehicles under the protection of about 40 guards.
He said Mr Suthep on Wednesday stayed at a hotel near Ratchaprasong intersection.
The authorities would try to arrest Mr Suthep, because he is wanted on a charge of inciting rebellion.
Asked about the bomb attacks on the houses of PDRC core members and Democrat Party leader Abhisit Vejjajiva, Mr Surapong said the authorities were investigating. He suggested that politicians sometimes tended to make up a situation.
Asked about Capo's plan to send a letter to the United Nations secretary-general, Mr Surapong said the authorities were compiling pictures and other evidence of Mr Abhisit speaking on the PDRC stage and of former Democrat MPs taking part in protest activities.