Jane Onyanga-Omara

USA TODAY

Two train stations in Munich reopened Friday, hours after they were closed due to fears of an imminent terror attack.

Police in the southern German city asked people to stay away from the stations on New Year's Eve because of a "serious, imminent threat" by Islamic State suicide bombers. The warning remained in place Friday.

"The information about an imminent terror attack at midnight was very concrete," police spokeswoman Elisabeth Matzinger told The Associated Press. "Even though nothing happened, our terror warning stays in place."

Late Thursday, officials said they had "serious information" that an attack was planned and warned residents to stay away from the city's main train station and another station in the Pasing neighborhood.

German police warn of 'imminent' ISIL terror attack

Munich police president Hubertus Andrae said authorities were tipped off by a foreign intelligence service that the Islamic State, also known as ISIS or ISIL, was planning attacks with five to seven suicide bombers, the German news agency dpa reported.

Bavaria's interior minister Joachim Herrmann said Friday that authorities had details of some of the possible attackers and were investigating and verifying the information. He said no arrests had been made and called on the city's residents to be cautious, but to continue their lives as normal.

Thousands of people in Munich welcomed 2016 with fireworks, despite warnings to stay away from large crowds. Cities across Europe and the world were on a heightened state of alert for the New Year's festivities in the wake of several recent terror threats and a deadly series of attacks on Paris in November that left 130 dead.