India has signed a deal with Vietnam to supply BrahMos supersonic cruise missiles jointly developed with Russia, while negotiations for a similar agreement with Indonesia are in the final stages, Defence Secretary Rajesh Kumar Singh said on Saturday.The financial details of the Vietnam and Indonesia agreements have not been officially disclosed. However, a deal with Vietnam could be worth about Rs 60 billion (USD 629 million), including training and logistical support, Reuters had previously reported, citing a source.advertisementRead Full StorySpeaking at Asia's premier defence forum, the Shangri-La Dialogue in Singapore, Singh said Vietnam had already signed the agreement, although it…