Nadia El-Nakla also told BBC News some relatives have had their homes destroyed in missile strikes.
Elizabeth El-Nakla and Maged El-Nakla, who live in Dundee, travelled to Gaza last week to see a sick relative.
Days into their trip Hamas killed 1,200 people, Israeli officials say.
Palestinian health officials say 1,200 people have died in Israeli airstrikes in Gaza as the death toll continues to rise in the conflict.
On Tuesday Mr Yousaf called for the creation of a humanitarian corridor in and out of locked-down Gaza. » | James Cook & Paul O'Hare, Scotland editor | Thursday, October 12, 203