An explosion has occurred in front of St. Mark’s Coptic Orthodox Cathedral, Alexandria, killing six and injuring 33 according to Egypt’s Health Ministry as cited by the AP. This follows a suspected bomb attack in Tanta, Egypt earlier Sunday morning.

Tawadros II, Pope of Alexandria, had finished celebrating Palm Sunday mass and had left the scene when the explosion took place. He is reported unhurt.

The Egypt Independent reported a heightened security presence and that authorities had been placed on alert in anticipation of such attacks on Palm Sunday.