Protesters carried signs and marched after gathering by Baitul Mukarram National Mosque in Dhaka.
It comes as Israel fired artillery and mounted extensive air strikes on Friday against a network of Palestinian militant tunnels under Gaza that it dubbed "the Metro," amid persistent rocket attacks on Israeli towns.
The most serious fighting between Israel and Gaza militants since 2014 began on Monday (May 10) after the enclave's ruling Hamas group fired rockets at Jerusalem and Tel Aviv in retaliation for Israeli police clashes with Palestinians near al-Aqsa mosque in Jerusalem.
At least 119 have been killed in Gaza and 830 others wounded in the current hostilities, Palestinian medical officials said. The death toll in Israel stood at eight.