COLOMBO, Sri Lanka (CNN) -- Tamil Tiger rebel aircraft bombed a power station outside Sri Lanka's capital, Colombo, late Tuesday, military sources said.
The attack came barely an hour after rebels bombed a major army base the nation's seaside district of Mannar, wounding two soldiers, they said.
Kelanitissa power station, between Colombo and the international airport in Negombo, caught fire, but there were no reports of injuries there.
The station provides thermal power to the capital when there is a drop in the output of the national grid, which operates on hydro power.
Air Force officials said two Czech-built, Z-142 light aerobatic trainers were used in the attack.
They didn't know if the same planes bombed the army base, which is the military's headquarters of operations in the Wanni region. Three bombs fell on the base in the village of Thallady.
All major security installations, including the army base, were enforcing a blackout.
The army base is 194 miles (312 km) northwest of Colombo.
The fighting in Sri Lanka pits government forces in a country dominated by the Sinhalese ethnic group against rebels from the Tamil minority.
The rebels, formally known as the Liberation Tigers of Tamil Eelam, are fighting for the creation of an independent nation, citing discrimination by the Sinhalese.
The last rebel airstrikes were September 9 in Vavuniya, the northernmost town under government control.