In pictures: Kunming railway station attack

Chinese policemen patrol a street near the railway station in Kunming, southwest China's Yunnan province on 2 March 2014

China has stepped up security in Kunming following a deadly knife attack on the southern city's railway station.

A Chinese police investigator inspects the scene of an attack at the railway station in Kunming, southwest China's Yunnan province on 2 March 2014

The attack took place late on Saturday night and left 29 people dead and more than 130 others wounded.

A woman reacts at the crime scene outside Kunming railway station on Saturday 1 March 2014

There were scenes of shock and anguish as terrified people were sent fleeing from the station.

Chinese police investigators inspect the scene of an attack outside the railway station in Kunming, southwest China's Yunnan province, on 2 March 2014

Witnesses say they saw attackers dressed in black and armed with knives, who began slashing and stabbing people at random.

In this photo provided by China's Xinhua News Agency, China's politburo member Meng Jianzhu, second left, visits the wounded who was injured in a knife attack, at No. 1 People's Hospital in Kunming, capital of southwest China's Yunnan Province, Sunday, 2 March 2014

China sent medical specialists to the railway station on Saturday night and more than 60 victims were rushed to hospital for emergency treatment. China's security chief, Meng Jianzhu (C) also went to the scene.

Chinese police stand guard at the scene of an attack at the main train station in Kunming, Yunnan province on 2 March 2014

China has blamed the savage attack on separatists from the north-western Xinjiang region. Chinese President Xi Jinping vowed "all-out efforts" to investigate the attack.

In this file picture taken on 28 October 2013, police cars block off the roads leading into Tiananmen Square as smoke rises into the air after a vehicle crashed in front of Tiananmen Gate in Beijing.

Authorities also blamed a fatal attack last year which saw a car driven into a crowd of people on the edge of Beijing's Tiananmen Square, killing five people, on Xinjiang separatists.

Chinese mourners light candles at the scene of the terror attack at the main train station in Kunming, Yunnan Province on 2 March 2014

A candlelit vigil was held on Sunday night outside Kunming's railway station to commemorate victims of the attack.