South Korean authorities launched an investigation on Tuesday after three people died during a car test at a Hyundai Motor plant in the city of Ulsan, police told Reuters.

The two Hyundai researchers and one Hyundai contractor were found unconscious in a car at around 3:00 p.m. while they were testing it in a "chamber," according to Hyundai's labour union.

South Korean media reports said the three had suffocated.

A police officer in Ulsan said the police and the labour ministry were investigating the incident, including its cause.

A fire department official told Reuters that it first received a report at 3:17 pm that the accident happened at Hyundai's No.4 factory.

"Hyundai Motor Company is deeply saddened by the incident that occurred at our plant in Ulsan, South Korea," Hyundai said in a statement, saying it would "cooperate fully with all relevant authorities to determine the cause of this incident."

The Ulsan plant is Hyundai's biggest manufacturing facility, with its own port and an annual production capacity of 1.4 million vehicles, including exports of 1.1 million units.

In November last year, Hyundai Motor broke ground on a 2 trillion won ($1.44 billion) plant in Ulsan dedicated to making electric vehicles in South Korea, as the automaker accelerated a shift away from petrol-powered cars.

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Eleven people were killed in a suicide car bombing at a security post in Khyber Pakhtunkhwa province in Pakistan, officials confirmed Wednesday.

The attack, one of the deadliest in recent months, happened Tuesday evening in Bannu district.

A breakaway faction of Tehreek-e-Taliban Pakistan (TTP), known as the Hafiz Gul Bahadur group, claimed responsibility for the attack.

Tuesday's attack happened in Bannu while the country's political and military leadership were meeting in Islamabad to discuss ways to respond to the surge in militant violence.

Prime Minister Shehbaz Sharif on Tuesday approved a “comprehensive military operation” against separatist groups, including the Baluchistan Liberation Army, in southwestern Baluchistan province.

The order came following a Nov. 9 suicide attack by the group at a train station that killed 26 people in Quetta, the capital of the province.

The newly appointed ambassador of Uzbekistan, Oibek Usmanov, presented a copy of his credentials to Afghanistan’s acting Minister of Foreign Affairs Amir Khan Muttaqi in Kabul on Wednesday.

Muttaqi Usmanov and assured him that the ministry will fully cooperate with him on relevant matters.

The acting minister said Afghanistan and Uzbekistan now have operational embassies in each others’ countries, which is a sign of progress in bilateral relations.

He emphasized that practical steps should be taken in the field of major economic projects between the two countries.

Usmanov in turn said relations between the two countries are brotherly and promised to make efforts to further develop relations between the two countries during his mission.

The new ambassador also said the regular visits by delegations to each others’ countries was an example of the close relations that already exist.

No country has yet officially recognized the Islamic Emirate as the government of Afghanistan however, a number of regional countries have accepted and recognize IEA diplomatic missions.