The joint acting German FA (DFB) president Reinhard Rauball has said the weekend's Bundesliga matches will go ahead as planned after the Germany-Netherlands friendly on Tuesday was cancelled because of a terror threat.
The friendly, due to have been played at the HDI-Arena in Hanover, was called off around 90 minutes before kick-off after what police said was "concrete" evidence of a bomb threat.
Bundesliga clubs have stepped up security measures for the weekend's domestic games, which begin when Hamburg play Borussia Dortmund on Friday.
Rauball, also the president of the German Football League, told news agency dpa late on Tuesday: "The matchday will go ahead."
In a later statement, he said: "We have great confidence in the federal and state security authorities. We will not yield to terror, but the protection of human lives has to have the highest priority."
Rhineland-Palatinate interior minister Roger Lewentz, the current head of the Interior Ministers' Conference, said the security authorities were in constant contact with the German Football League.
He urged fans not to use bangers or pyrotechnics in the stadium, saying: "Given the current situation, this would be downright negligent."
Hamburg have said they are "set to increase the number of stewards, who will also be in plain clothes in and outside the stadium."
Schalke are in talks with police prior to their match against league leaders Bayern Munich, while Hertha Berlin, who host Hoffenheim, have said they will "implement an extensive package of measures."
Bild reported that would include checks of both people and cars heading to the match.
German federal interior minister Thomas De Maiziere told a news conference on Tuesday night that indications of a planned attack on the Germany-Netherlands game had become stronger as kick-off approached.
He said he had made the decision to call off the match while travelling from Berlin to Hanover but declined to go into detail, saying "some of the answers would unsettle people."
De Maiziere and German Chancellor Angela Merkel had been on the same flight. Both had been due to attend the match, which they wanted to send a "clear message for freedom and democracy" in the wake of Friday's terrorist attacks on Paris.
Merkel returned to Berlin while De Maiziere stayed in Hanover to head to a "Lagezentrum" -- similar to the White House's Situation Room -- amid the unfolding events.
Lower Saxony interior minister Boris Pistorius, speaking at a news conference, said no explosives had been found and later told ZDF TV a tip-off had led to the match being called off.
Rauball said it was "a sad day for German football" and added: "My impression is that football in Germany has taken a different turn in every facet as of today."
Rainer Koch, working alongside Rauball as acting DFB president, told Sport1: "I see the development of terrorism as very worrying. The risk of terrorism in Germany is considerable.
"That of course will have ramifications on the necessary security measures for major events, but we have got to put all we can into ensuring these can continue to take place."
Germany were playing France in a friendly at the Stade de France during the terror attacks in Paris on Friday.
Explosions could be heard outside, but the game was played to its conclusion and both the Germany and France teams spent the night in the stadium.
Earlier on Tuesday, Germany international Ilkay Gundogan told DFB TV that national team players had initially "spoken out against" playing the match in Hanover "because we are not machines, but human beings."
Information from the Press Association was used in this report.