German officials say they have thwarted an attack on a gay club and a Catholic church near Frankfurt. The alleged bomber was a 17-year-old.

Hesse State Police picked up the suspect on September 1, 2018 based on information provided by the U.S.

According to the data, the would-be bomber had picked out the two targets, but would not elaborate on the specific locations. The suspect has also not been named at this time.

The suspect was also in possession of instructions to create triacetone triperoxide (TATP), and was seeking sources for the chemicals to create same.

TATP is a popular explosive among terrorists, thanks to the relative ease of obtaining the chemicals to create it.

Officials have not elaborated on how far along the suspect was in preparing his explosive, but did find small amounts of the chemicals to create TATP in the suspect’s home in Florstadt, roughly 35 kilometers northeast of Frankfurt.

German officials have worked with U.S. intelligence on other such attacks, most notably in stopping the 2007 attempted bombing at the Ramstein Air Base in Rhineland-Palatinate.