kathmandu blast
Image courtesy: BBC News

At least four persons have been killed and another seven injured in a serial explosion that rocked Nepal capital Kathmandu early Monday morning.

According to preliminary investigation, the explosions at three different places may have been triggered by a Maoist splinter group.

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However, no one has claimed responsibility for the explosions.

While three persons were killed on the spot, the fourth one died while undergoing treatment at a hospital. One person was killed in an explosion inside a house in the Ghattekulo residential area in the heart of the city, according to reports.

Three people died in the second blast which took place near a salon in the Ukedhara area on the outskirts of the city.

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According to witnesses, the explosion shattered the door and window panes of the shop, and the area had been sealed off by the army.

The third explosion went off near a brick kiln in the Thankot area of Kathmandu, injuring two people.

All seven injured peopler were taken to hospital.

Nepal emerged from a decade-long Maoist civil war in 2006 and the main group of the former rebels has joined the party that runs the government.

The breakaway group of former rebels carried out a similar blast in Kathmandu in February in which one person was killed and two others were injured.