Pakistan, May 5 -- A powerful explosion at a fireworks manufacturing factory in China Hunan province has killed at least 21 people and injured 61 others, according to state media reports, prompting a nationwide safety review and urgent government response.

Read More: Death toll hits 20 after massive blast rips through Faisalabad factory

The blast occurred on Monday afternoon in Liuyang, a city under Changsha administration known as a major hub for fireworks production. The explosion reportedly took place around 4:40 pm local time at the Huasheng Fireworks Manufacturing and Display Company.

Television footage and social media videos showed thick plumes of smoke rising into the sky from the industrial site, along with extensive structura...