Three killed in heavy fighting in Ukraine's Donetsk

Special: Ukraine crisis

DONETSK, Ukraine - At least three people were killed as heavy fighting erupted in the east Ukrainian city of Donetsk between insurgents and government troops on Monday.

Intense gunfire and blasts were heard near the airport and the railway station in the northwest of the insurgent-controlled city, where local residents were fleeing the battle zone.

At least three people were killed and another one injured in the latest fighting, the Interfax news agency quoted health authorities in Donetsk as saying.

Civilians, including elders, women and children, were evacuated from the railway station and headed to downtown Donetsk.

A resident who called himself Vitaly said he heard explosions every day recently, and that the Monday explosions started earlier in the morning.

"I have no job, no salary, no subsidies ... I live in panic every day," he told Xinhua.

The clashes flared up as an international investigation team made up of experts from the Netherlands, the United States and Germany has arrived in Ukraine's east to probe the downing of a Malaysian passenger jet last week.

The Boeing 777 plane en route from Amsterdam to Kuala Lumpur crashed near Donetsk on Thursday, killing all 298 people on board.

The Ukrainian government and insurgents in the restive eastern regions have traded barbs, accusing each other of being responsible for the incident and hindering the investigation.

Also on Monday, Ukrainian President Petro Poroshenko ordered an immediate ceasefire within a 40-km zone around the crash site.

"I have instructed the Ukrainian military personnel to stop their operations and halt fire in a radius of 40 kilometers from the scene of the tragedy," Poroshenko told reporters during his visit to the Malaysian Embassy in Kiev.

Describing the crash of the passenger plane as a "global tragedy" and a "threat to the whole world," the president urged the international community to act decisively in investigating the incident.

Poroshenko said that he has invited experts from the Netherlands, Malaysia, Germany, Britain, Australia, the United States and Russia to take part in the investigation.

He believed that a joint investigation team of international experts would ensure the maximum transparency of the process.

According to Ukrainian Prime Minister Arseny Yatsenyuk, the 31-strong team of experts arrived at Kharkov in eastern Ukraine earlier Monday.

"We'll try to create a humanitarian corridor so they could get to the site of the tragedy," Yatsenyuk told reporters.

Moscow said on Monday that the work of the international experts at the air crash site has been hampered by security issues.

"Investigation of the disaster by a monitoring mission of the Organization for Security and Cooperation in Europe and relevant Ukrainian services has been hampered by lack of consent between the domestic conflicting sides over safety guarantees for the foreign experts," the Russian Foreign Ministry said in a statement.