Just days after German lawmakers approved a bill that extends marriage to gay and lesbian couples, conservatives are looking for a way stop the bill from taking effect.

Alexander Gauland, the vice chair of Germany's Alternative für Deutschland (AfD) party, told Bild Zeitung that the party is considering a lawsuit.

“We are currently studying a challenge at the constitutional court,” Gauland told Germany's largest circulating newspaper.

According to Politico, the AfD last week announced the death of the German family on its website. “In deep sorrow, we say good-bye to the Germany family, whose constitutional protection was buried by the 'representatives of the people' at the German parliament,” the notice reads.

(Related: Angela Merkel reiterates opposition to gay marriage.)

Bundestag Vice President Johannes Singhammer of Chancellor Angela Merkel's Bavarian sister party the CSU told Die Welt on Monday that the bill's constitutionality should be challenged.

“In order to achieve legal clarity, I suggest that the Constitutional Court should be called upon,” he said. “It would be faster, however, if a state government were to do this – for example the Bavarian government.” Bavaria is considered a conservative stronghold.

The Constitutional Court has repeatedly ruled against supporters of marriage equality.