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	The planes will be delivered over the next 30 months and cost around110 million dollars, a senior air force official told dpa on condition of anonymity.</div>
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	The contract was signed on Thursday, KAI said online.</div>
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	The Thai military have a further option to purchase 20 more T-50 jets in the future.</div>
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	The plane was chosen over Chinese L-15 trainers, the official told dpa.</div>
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	The T-50 is a supersonic trainer that can double as a light attack aircraft. The plane will be used to train pilots for the existing fleet of Swedish-made JAS 39 Gripens and US-made F16 Fighting Falcons.</div>
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Thai air force buys trainer jets from South Korea

Bangkok (dpa) - The Royal Thai Air Force will purchase four T-50 trainer jets from Korea Aerospace Industries (KAI), officials said Friday.