JERUSALEM, Feb. 10 — Persian Gulf tensions have claimed their first Israeli fatality.

A 35-year-old mother of seven was killed Tuesday in Tel Aviv when she fell four floors after trying to retrieve gas masks for her children.

The gas masks were in an apartment from which her family had been evicted. The woman, who was four months pregnant, had entered the apartment from a neighbor's balcony and fell when she left the apartment and again climbed onto the balcony.

She had been unable to locate the masks.

Israelis concerned about a possible Iraqi missile attack are flocking to distribution centers to obtain gas masks.

Meanwhile, Israel Defense Force officials estimate that they are short some 200,000 gas masks.

Israel's defense minister, Yitzhak Mordechai, said that supplies began arriving from Germany, Holland and Sweden, and that inventories were expected to be full within a matter of days.