Dozens of heavily armed police are at Centro Ismaelita, where funeral ceremonies are being held for Farana, one of those killed in the violent attack on Tuesday morning.
While the possibility that it was a terrorist attack has been ruled out, the equipment around the funeral is indicative of heightened caution.
Farana, 49, was born in Mozambique but naturalized in Portuguese, was Muslim and volunteered at the centre.
The aggressor would have an obsession with a woman with whom he would like to maintain a love relationship, and this could be one of the motives for the crime.
Today, Farana will be buried in the Karnide cemetery, and tomorrow there will be a final farewell to Mariana, a 24-year-old Catholic who also died in the attack.
At the funeral ceremony, in addition to many ambassadors, there are the representative of the Pope, the Apostolic Nuncio, the head of the civil house of the President of the Republic, the Secretary General of the Ministry of Foreign Affairs, the mayor of Lisbon, Carlos Moedas, and the leader of the Left Bloc, Catarina Martins.