An Iranian diplomat was among six people who were arrested on suspicion of plotting an attack against a meeting of an Iranian opposition group in the French capital, Belgian authorities announced on Monday. Two suspects in Belgium were intercepted by Belgian police on Saturday, with 500 grams of TATP, a home-made explosive produced from easily available chemicals, as well as a detonation device found in their car, a joint statement by the Belgian prosecutor and the intelligence services said. The 38-year-old man and a 33-year-old woman, identified only as Amir S. and Nasimeh N., were charged with attempted terrorist murder and preparation of a terrorist act, it said. The diplomat at the Iranian embassy in the Austrian capital Vienna was arrested in Germany, the Belgian statement said. Three people of Iranian origin were arrested in France to assess their link to the Brussels suspects, a French judicial source said. US President Donald Trumps lawyer Rudy Giuliani and several former European and Arab ministers attended the meeting of the Paris-based National Council of Resistance of Iran (NCRI) - an umbrella bloc of opposition groups in exile that seek an end to clerical rule in Iran. The Belgian statement gave no further details about diplomat, other than saying they were suspected of having been in contact with the Belgian pair arrested. It said one of those arrested in France, Merhad. A, was a suspected accomplice of the pair in Brussels. The NCRI meeting, which attracted a crowd of thousands, took place on Saturday in Villepinte, just outside Paris, a three-hour drive from Brussels. "A plot by the religious dictatorship ruling Iran to carry out a terrorist attack against the grand gathering of the Iranian Resistance in Villepinte was foiled," Shahin Gobadi spokesman for NCRI said in a statement. The Peoples Mujahideen Organization of Iran, is the main component of NCRI. The group, also known by its Persian name Mujahideen-e-Khalq, was once listed as a terrorist organization by the United States and the European Union but is no longer. Following the arrests, Belgian authorities also conducted five raids in different parts of the country but did not elaborate on whether anything was found. Belgian Prime Minister Charles Michel on Twitter thanked police and intelligence officers for their work. "Once more the good cooperation between countries has borne fruit," Michel wrote.