NEW DELHI: The Indian Navy today swung into action to help a sick Indian on board a merchant vessel in a Yemeni port after a tweet by one of his relatives to External Affairs Minister Sushma Swaraj Tulika Singh tweeted to Swaraj saying that her cousin, an electrical officer on board an India registered ship was not well and at a Yemeni port.Swaraj tweeted the matter tagging Defence Minister Manohar Parrikar and the Indian Navy.The Navy promptly got in touch with Singh seeking details over Twitter."Matter taken up thru DG Shipping with shipping company. Officers condition has improved & all assistance being provided by company," it tweeted tagging Swaraj too.It added that the company doctor was in touch with ship over satellite and that DG Shipping was also monitoring the situation.Navy sources said the individual has been taken off duty by the private company and would be evacuated tomorrow.