Iraqi asylum seeker Zaid K has been arrested in Germany for sexually assaulting two Chinese students

Another refugee has been arrested in Germany for sexually assaulting two Chinese students.

The man was seized five days after illegal Afghan migrant Hussein Khavari, 17, was apprehended for the rape and murder of medical student Maria Ladenburger in Freiburg.

The latest suspect is 31-year-old Iraqi asylum seeker Zaid K., who came to Germany in 2015 and lived with his wife and two children near the scene of the two attacks in the city of Bochum.

Prosecutors say he struck twice: once in August when he seriously injured a 21-year-old student after he attempted to rape her, and again in November.

In the second attack a 27-year-old Chinese woman reported that she was attacked and raped.

Police say the boyfriend of victim number one took photos of the suspect lingering at the crime scene days later. These led detectives to the refugee home where he lived.

Police murder squad chief Roland Wefelscheidt said: 'The photos were pin sharp and we had no trouble identifying him at the asylum centre.'

DNA evidence from both crime scenes has linked him to the attacks, according to police and prosecutors.

The man is now being investigated for other unsolved sex crimes in the area.

News of his arrest came on the same day that Chancellor Angela Merkel promised to get tough on illegal migrants as she battles for a fourth term in office next year.

Hussein Khavari (right), 17, has been linked by his DNA to the murder of Maria Ladenburger (left), 19, a medical student whose father is a legal adviser to the European Commission in Brussels

On Wednesday it was revealed that migrants committed 1576 sex crimes in Germany in 2015. In the first half of this year the figure already stood at 1683.

Most offenders came from Muslim countries. The most notorious sex attacks occurred in Cologne on New Year's Eve when mobs of North African men sexually assaulted and robbed hundreds of women.

Internet abuse against migrants is rising since the arrest last Friday of the Afghan teen accused of murdering Maria Ladenburger in October.

Maria, daughter of a high-ranking EU bureaucrat, was ironically a refugee helper in her spare time. She was taped then drowned in a river after her attacker ambushed her as she rode home on her bicycle from a party.

The killing of 19-year-old Maria Ladenburger (pictured) has enraged people in Freiburg