An unidentified Palestinian man approached the Gaza border fence with Israel on Sunday morning, prompting an IDF tank to fire shells in his direction.
The IDF said there were no casualties on either side during the incident, which occurred on the border with northern Gaza.
Palestinian medics claimed, however, that five Palestinian day labourers were hurt by the shelling.
Muawiya Hassanein, the head of Gaza emergency services, said two of the wounded were in serious condition.
Army sources say an upsurge in attempts by terrorists from Gaza to plant bombs along the border fence has been recorded in recent days.
Last week, a soldier was lightly wounded by shrapnel caused by an explosive device planted to target an IDF patrol. AFP contributed to this report