At least 85 bodies were found washed up on Zuwara's sandy beaches on Thursday but it was unclear whether they were from the same disaster or other sinkings.
Speaking to the Associated Press, Col Gassim blamed Europe for "doing nothing but counting bodies" to stop migration from Libya.
The country is a common launching point for smugglers sending migrant ships towards Italy, normally leaving them to drift before being picked up by rescue ships.
Friday's disaster came as rescue operations continued after a separate sinking off the coast of Crete, where at least four bodies had been recovered and more than 300 people rescued.
Hundreds of asylum seekers have drowned in successive disasters in the Mediterranean Sea in recent weeks amid concerns that the EU-Turkey deal seeing migrants detained on Greek islands is forcing desperate migrants to take longer and more treacherous journeys.
The vast majority of arrivals are now landing in Italy after crossing the Central Mediterranean from North Africa.
At least 880 migrants died last week alone and deaths are up more than a third compared to the same period last year, according to figures compiled by the United Nations refugee agency (UNHCR).
More than 2,500 migrants have died at sea in attempts to reach Europe this year, while more than 205,000 people have made the journey.
David Cameron announced last week that Britain would send a warship to the Mediterranean to combat people smuggling as EU and Libyan naval operations continue.
The majority of asylum seekers currently arriving in Italy are from sub-Saharan Africa, with the largest group from Nigeria, at 15 per cent, followed by Gambia, Somalia, the Ivory Coast, Eritrea, Guinea and Senegal.
In Greece, 49 per cent of those to have arrived so far this year were from Syria, while a quarter were from Afghanistan, 15 per cent from Iraq and others from Pakistan and Iran.
