TAIPEI Taiwanese chipmaker TSMC said on Thursday that there was no damage to its facilities after an incident at its Arizona factory construction site, where a waste disposal truck driver was transported to hospital.

Firefighters responded to a reported explosion on Wednesday (May 15) afternoon at the Taiwan Semiconductor Manufacturing Company (TSMC) plant in Phoenix, the Arizona Republic reported, citing the local fire department.

TSMC, the world's largest contract chipmaker whose clients include Apple and Nvidia, said in a statement that none of its employees or onsite construction workers had reported any related injuries.

"This is an active investigation with no additional details that can be shared at this time," it added.

TSMC's Taipei-listed shares pared earlier gains after the news, and were last up around 0.8% on Thursday morning.

TSMC last month agreed to expand its planned investment by US$25 billion to US$65 billion and to add a third Arizona fab by 2030.

The company will produce the world's most advanced two nanometre technology at its second Arizona fab, expected to begin production in 2028.

  - Reuters