Student protesters threw stones and tomatoes at US consulate grounds in Guangzhou for a third day yesterday. The Shamian diplomatic district, home to the US and German missions, was again deluged by thousands of students from local universities. But unlike the weekend, the police presence was more evident, with Guangdong authorities calling out armed officers to guard consulate property and prevent a repeat of Sunday's violence, which saw hundreds of demonstrators break windows and force their way into the German consulate. Students from Zhongshan University and Guangzhou College of Traditional Chinese Medicine were told by police to remain orderly. Despite some scuffling and rock-throwing, the students moved past the grounds without incident. Long Zhipeng, a Zhongshan University student, said: 'Everyone wants to come here, but some students had classes this morning. They'll come later.' Mr Long said they were being organised by the university's students union. Elsewhere in the city, it remained quiet, with only scattered protests at the Gitic Building, home to the consulates of Great Britain, France, Italy and the Netherlands. Alexander Thiel, of Pinkerton Consulting Services, said: 'Private business has not seen any problems.' German Consul-General Wolfgang Runge registered a 'strong protest' with the Guangdong provincial Government over the attack. 'What happened cannot be in any way justified by any events around the world,' said a Guangzhou-based German diplomat. The diplomat deplored the violence, which left consulate windows smashed and furniture broken. 'The police stood idly by while all this happened. They didn't do anything,' he said. 'They only went into action when some of the people tried to force their way into the consulate and intervened at a late stage.' US diplomatic personnel expressed satisfaction with protection offered by the provincial authorities. 'They've done a great job of keeping [protesters]) out of here,' a US official said. The US consulate, as with other US diplomatic offices throughout the mainland, will be closed until at least tomorrow. A Guangdong official said: 'We are trying our best to protect all the property of the foreign institutions here.'