STOCKHOLM, Feb 23 (Reuters) - Sweden is open to sending some of its Leopard battle tanks to Ukraine as the Nordic country prepares to present another package of aid to help the country fight off the Russian invasion, its defence minister told local news agency TT. Sweden is also preparing to send Ukraine the advanced Archer artillery system to Ukraine, but support in the Swedish parliament has been growing to additionally contribute some of the country's around 120 Leopard tanks. Sweden is also preparing to send Ukraine the advanced Archer artillery system to Ukraine, but support in the Swedish parliament has been growing to additionally contribute some of the country's around 120 Leopard tanks