Airspace

According to the alert, gun firing exercises will occur from ground level up to 10,000 feet above mean sea level (AMSL).

In April, Jordan said it intercepted flying objects that entered its airspace as Tehran launched explosive drones and fired missiles at Israel in the first direct retaliatory attack of its kind.

EASA said all affected airspaces - Israel, Lebanon, Jordan, Iraq and Iran - were closed by the relevant authorities during the relevant period.

Global travel warnings arise as tensions escalate between Israel and Iran, prompting airspace closures and flight cancellations across the Middle East.

The mission is meant to deliver first-of-its-kind views of the phytoplankton -- microscopic plant-like organisms -- that convert carbon dioxide into cellular material to feed oceanic life. 

Nearly 500 soldiers of the Territorial Defense Force took part in the search near the city of Zamosc in southeastern Poland.

"The Romanian Army's radar surveillance system identified a possible unauthorized breach of national air space, with a signal detected on the route to the town of Galati," the defense ministry said.

To this day, nobody knows why the small jet lost contact minutes after takeoff and crashed down to earth, four and a half hours later.

China has over the past three years regularly flown its air force into the skies near the island, though not into Taiwan's territorial air space.

The Baltic Sea has witnessed in recent months several interceptions by Russian, US and NATO aircraft.