Indian conglomerate Tata Sons and Singapore Airlines (SQ, Singapore Changi) have agreed to inject an additional INR1.5 billion (USD22.35 million) into their Vistara (UK, Delhi Int'l) joint-venture.

Quoting Indian regulatory filings, the Business Standard newspaper says the decision to boost the carrier's capital base was taken back in June. Tata Sons owns 51% of Vistara with the Singaporeans owning the rest.

It is recalled that during the same month, Tata Sons and Malaysia's AirAsia Group agreed to inject an additional INR2.34 billion (USD34.88 million) into their AirAsia India (I5, Chennai) joint-venture as well.