Declining to acknowledge any role for the Indian Navy which said its chopper provided the air cover for the Chinese soldiers to enter the Tuvalu-flagged ship OS35, Foreign Ministry spokesperson Hua Chunying said the air support was provided by Chinese helicopter attached to the ship.
The missile frigate Yulin circled the ship while its helicopter provided air cover, she said, making no mention of the Indian Navy's helicopter support to the Chinese troops.
"Rescue operation was launched on earlySundaymorning. Sixteen Chinese soldiers successfully boarded the timber-carrying freighter, and freed its crew," she said.
"They also conducted a comprehensive search of the ship to make sure no pirate was on board. 19 crew members released from the strong room where they had taken shelter, while also searching the ship to ensure there were no further threats," she said.
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When questioned about the absence of any reference to the Indian Navy's role in the operation, Hua said China's Ministry of Defence should be approached for details.
"I have already given to you what I have learnt. The Chinese convoy received report from the UKMTO and conducted rescue operation.With regards to details I refer you to the Chinese defence ministry," she said.
"As I just said the Chinese side is always positive towards international cooperation against pirates. This position is very clear," she reiterated.
When asked about the Chinese navy's statement, Indian Navy spokesperson in New Delhi referred to his tweet, "Indian Navy Chetak Helicopter on top of PLA Navy boats carrying boarding party to MV OS35 in coordinated anti piracy ops @SpokespersonMoD".
He also posted a picture which showed an Indian helicopter flying over a Chinese navy vessel.
The surprise omission of Indian Navy's role in the operation comes as the Indian Navy in New Delhi said that the navies of the two countries worked in a well-coordinated operation to rescue the vessel.
The Indian Navy also said that the Chinese navy thanked it for its role in the operation.
"In a show of international maritime cooperation against piracy, a boarding party from the nearby Chinese navy ship went on board the merchant ship, while the Indian naval helicopter provided air cover for the operation. It has been established that all 19 Filipino crew members are safe," Indian Navy spokesperson Capt D K Sharma said yesterday.
China and India have been operating ships in the Gulf of Aden for several years.
In May 2011, China had acknowledged Indian Navy's help in saving 24 Chinese sailors aboard Panama-flagged bulk carrier, Full City, frompirates. At that time, Chinese navy's flotilla was on an escort duty in theGulfofAden- 1,200 nautical miles away from the scene of the assault.