Three new cases of novel coronavirus infection have been confirmed in Germany, bringing the total number of patients with the disease in the country to four.

All four people who tested positive work for the same company near Starnberg, Bavaria, and are believed to have come into contact with the virus via a colleague from China who visited Germany for a workshop last week.

"There were a total of around 40 employees who have been determined to have been in contact with the (Chinese) woman," German health authorities said on Tuesday. "Those affected will be tested on Wednesday as a precaution."

As of Tuesday, novel coronavirus has killed 106 people and infected more than 4,600 others. The first confirmed European cases of infection occured last week in France.