Seems a bird strike on approach. Lately, there have been too many birds in that area, specially the populated area. A plane can't lose both engines simultaneously unless big birds such as black kites, which are in plenty in Karachi nowadays, strike the plane. These birds fly high and in large numbers.
They are all Shuhada, the passengers as well as those who died on the ground. Also, they are gone in the blessed month of Ramadan, in shaa Allah they are going to Jannah directly. May Allah give sabr to the kins of those who died.
The Final Prophet (Peace be upon him) said, “The martyrs are seven, other than the one who is killed in the Way of Allaah, Ta’aalaa:
– one who dies of plague,
– one who drowns,
– one who dies of pleurisy,
– one who dies of stomachache,
– one who dies due to burning
– one who dies under a demolition (by accident)
– a woman who dies with a baby in her womb.”
(Maalik, Aboo Dawood, An-Nasaaee, Ibn Maajah, Ibn Hibban, Haakim, Ahmad. Authenticated by Sheikh Muhammad Nasir-ud-Deen al-Albani)
May Allah give speedy recovery to the wounded.