Two rockets launched at Israel from the Gaza Strip triggered air raid alarms in the area of the southern city of Sderot at approximately 7 p.m. local time.
According to initial reports, "a red alert was activated" by the app in that region.
Palestinian President Mahmoud Abbas has suggested that with Trump's move, the United States disqualified itself as mediator between Israelis and Palestinians, a role it has played exclusively in more than two decades of stop-and-go negotiations aimed at setting up a Palestinian state alongside Israel.
Last week, the Islamic Jihad launched a dozen mortar shells at an army post northeast of the Strip, causing no injuries but some damage to army equipment.
Palestinians and Israeli troops had skirmished at the border earlier in the day.
Illustrative image of a previous strike on Gaza.
In a Wednesday address from the White House, Trump defied worldwide warnings and insisted that after repeated failures to achieve peace a new approach was long overdue, describing his decision to recognize Jerusalem as the seat of Israel's government as merely based on reality.
A lengthy list of USA allies, regional powers and Palestinian politicians warned Trump against recognizing Jerusalem as Israel's capital in the lead-up to his announcement on Wednesday, saying that it would inflame tensions and provoke violence.
Both Israelis and Palestinians lay claim to Jerusalem, although Israel has retained control over the city since 1967. Today, we acknowledge that Jerusalem is the Israeli capital.