MOSCOW (AFP) - Russian Prime Minister Vladimir Putin and his Chinese counterpart Wen Jiabao will meet Monday to discuss expanding their loose Central Asian security alliance to include Pakistan and Iran.Putin will host host Wen in his native city of Saint Petersburg almost exactly 10 years after the two countries joined forces with the four ex-Soviet Central Asian republics to form the Shanghai Cooperation Organisation (SCO). Russia has previously billed the alliance as a regional alternative to NATO and discussed at past meetings the option of including other regional powers in its ranks. "We are talking about Pakistan and Iran, which have applied for membership," Russian foreign ministry spokesman Alexander Lukashevich said.