New Zealand Christchurch mosque shooting Highlights:\u00a0AIMIM President Asaduddin Owaisi thanked Minister of External Affairs Sushma Swaraj for making personal efforts in helping the families of Ahmed Iqbal Jahangir and Farhaj Ahsan reach New Zealand in time. In a tweet posted earlier, Owaisi sought urgent assistance from Swaraj, providing her with Ahsan's details. He also said that the MEA was putting all efforts to expedite the visa approval process. Prime Minister Narendra Modi on Friday expressed his deep shock and sadness at the loss of innocent lives in Friday's terrorist attacks at the places of worship in Christchurch. Mass shootings at two mosques killed 49 people in Christchurch city of New Zealand. Prime minister, Jacinda Ardern, called the incident as "one of New Zealand's darkest days," as authorities detained four people and defused explosive devices in what appeared to be a carefully planned attack.\u00a0A gunman broadcast live footage on Facebook of the attack on one mosque in the city of Christchurch, mirroring the carnage played out in video games, after publishing a "manifesto" in which he denounced immigrants, calling them "invaders". New Zealand was placed on its highest security threat level, Ardern said, adding that four people taken into custody held extremist views but had not been on any police watchlists.\u00a0"It is clear that this can now only be described as a terrorist attack," Ardern said, call this "one of New Zealand's darkest days". Authorities have not elaborated on who they detained. But a man who claimed responsibility for the shootings left a 74-page anti-immigrant manifesto in which he explained who he was and his reasoning for his actions. Ardern at a news conference alluded to anti-immigrant sentiment as the possible motive, saying that while many people affected by the shootings may be migrants or refugees "they have chosen to make New Zealand their home, and it is their home.