Update III (12:00 pm ET): The death toll has climbed to 52, the health ministry says.
Update II (11:30 am ET): The death toll from today's massacre has climbed to 43. Meanwhile, the Gaza Ministry of Health is urging Egypt to temporarily open its border to allow the transfer of patients to specialist Egyptian hospitals due to the sheer number of complex injuries (read gunshot wounds).
They're also asking for drugs, emergency medical disposables and dispatch medical teams.
Meanwhile, Turkey has stepped up as the first nation to condemn this morning's mass killing.
Update: In what is now the most deadly day since the beginning of Hamas's six-week-long "March for Return" demonstrations back in March, The Palestinian Health Ministry said the death toll from Monday morning's "terrible massacre" in Gaza has risen to 41 - with more than 1,700 wounded.