The IDF strike was carried out on a Hamas post in southern Gaza.
The source said separate strikes hit farming land in central Gaza, with no injuries reported in either incident.
The rocket landed in an open area near the security fence in the Eshkol Regional Council district, according to the IDF Spokesperson's Office.
An Israel Defence Forces tank attacked a Hamas post in the southern Gaza Strip in response to rockets fired on southern Israel.More news: Ancelotti rules out Vidal move but Sanches could go
Israel struck a position of Islamist group Hamas in Gaza on Monday, the army said, hours after a missile was sacked across the border from the besieged-Palestinian enclave.
There have been past cases of Palestinians crossing into Israel from Gaza expecting to get caught simply to leave the poverty-stricken, Hamas-ruled coastal enclave.
Although Hamas was not behind the shooting in Temple Mount of Jerusalem's Old City on July 14, the group hailed the shooting as heroic and essential and instigated Muslims to continue their protests, the statement said. It has been a flashpoint site for the Israeli-Palestinian conflict in the past decades since the 1967 Israeli occupation of Jerusalem's Old City.
On Sunday, Israel responded by detaining 25 members of the Hamas movement during overnight arrest raids in the occupied West Bank.