A 10-year old boy died while playing with an extruded missile in Yemen's southern province of Taiz on Sunday, the Yemeni state news agency Saba reported quoting a statement by a local security source.

Mubarak Muhammad Naji died and two girl children, 9-year old Ohoud and 12-year old Asmaa, were injured in the explosion of the missile that happened in 6th Street, the source said.

The authorities have and launched an investigation into the accident and warned to avoid such stuffs when found, Saba said.

Taiz was one of the Yemeni cities which turned into open battlefields for fierce battles between pro- and anti-revolution forces last year.

When mass protests erupted against the former regime, the unrest deepened the country's crises and then conflicts killed thousands and displaced hundreds of thousands of families in the north and south.

Scores have been killed and injured in landmine explosions since displaced families returned to their homes in Abyan where the army fought and drove Al-Qaeda out of their strongholds this year.