The Biden ad­min­is­tra­tion has told key law­mak­ers it would send more than $1 bil­lion in ad­di­tion­al arms and am­mu­ni­tion to Is­rael, three con­gres­sion­al aides said Tues­day. But it was not im­me­di­ate­ly known how soon the weapons would be de­liv­ered.

It’s the first arms ship­ment to Is­rael to be re­vealed since the ad­min­is­tra­tion put an­oth­er arms trans­fer, con­sist­ing of 3,500 bombs of up to 2,000 pounds each, on hold this month. The Biden ad­min­is­tra­tion, cit­ing con­cern for civil­ian ca­su­al­ties in Gaza, has said it paused that bomb trans­fer to keep Is­rael from us­ing those par­tic­u­lar mu­ni­tions in its of­fen­sive in the crowd­ed south­ern Gaza city of Rafah.

The pack­age dis­closed Tues­day in­cludes about $700 mil­lion for tank am­mu­ni­tion, $500 mil­lion in tac­ti­cal ve­hi­cles and $60 mil­lion in mor­tar rounds, the con­gres­sion­al aides said. They spoke on con­di­tion of anonymi­ty to dis­cuss an arms trans­fer that has not yet been made pub­lic.

There was no im­me­di­ate in­di­ca­tion of when the arms would be sent. Two con­gres­sion­al aides said the ship­ment is not part of the long-de­layed for­eign aid pack­age that Con­gress passed and Pres­i­dent Joe Biden signed last month. It wasn’t known if the ship­ment was the lat­est tranche from an ex­ist­ing arms sale or some­thing new.

The Biden ad­min­is­tra­tion has come un­der crit­i­cism from both sides of the po­lit­i­cal spec­trum over its mil­i­tary sup­port for Is­rael’s now sev­en-month-old war against Hamas in Gaza — at a time when Biden is bat­tling for re­elec­tion against for­mer Pres­i­dent Don­ald Trump.

Some of Biden’s fel­low De­moc­rats have pushed him to lim­it trans­fers of of­fen­sive weapons to Is­rael to pres­sure the U.S. al­ly to do more to pro­tect Pales­tin­ian civil­ians. Protests on col­lege cam­pus­es around the U.S. have dri­ven home the mes­sage this spring.

Re­pub­li­can law­mak­ers have seized on the ad­min­is­tra­tion’s pause on the bomb trans­fers, say­ing any less­en­ing of U.S. sup­port for Is­rael — its clos­est al­ly in the Mid­dle East — weak­ens that coun­try as it fights Hamas and oth­er Iran-backed groups. In the House, they are plan­ning to ad­vance a bill this week to man­date the de­liv­ery of of­fen­sive weapon­ry for Is­rael.

De­spite the one-time sus­pen­sion of a bomb ship­ment, Biden and ad­min­is­tra­tion of­fi­cials have made clear they will con­tin­ue oth­er weapons de­liv­er­ies and over­all mil­i­tary sup­port to Is­rael, which is the largest re­cip­i­ent of U.S. mil­i­tary aid.

Biden will see to it that “Is­rael has all of the mil­i­tary means it needs to de­fend it­self against all of its en­e­mies, in­clud­ing Hamas,” na­tion­al se­cu­ri­ty spokesman John Kir­by told re­porters Mon­day. “For him, this is very straight­for­ward: He’s go­ing to con­tin­ue to pro­vide Is­rael with all of the ca­pa­bil­i­ties it needs, but he does not want cer­tain cat­e­gories of Amer­i­can weapons used in a par­tic­u­lar type of op­er­a­tion in a par­tic­u­lar place. And again, he has been clear and con­sis­tent with that.”

The Wall Street Jour­nal first re­port­ed the plans for the $1 bil­lion weapons pack­age to Is­rael.

In re­sponse to House Re­pub­li­cans’ plan to move for­ward with a bill to man­date the de­liv­ery of of­fen­sive weapons for Is­rael, the White House said Tues­day that Biden would ve­to the bill if it were to pass Con­gress.

The bill has prac­ti­cal­ly no chance in the De­mo­c­ra­t­ic-con­trolled Sen­ate. But House De­moc­rats are some­what di­vid­ed on the is­sue, and rough­ly two dozen have signed on­to a let­ter to the Biden ad­min­is­tra­tion say­ing they were “deeply con­cerned about the mes­sage” sent by paus­ing the bomb ship­ment.

One of the let­ter’s sign­ers, New York Rep. Ritchie Tor­res, said he would like­ly vote for the bill, de­spite the White House’s op­po­si­tion.

“I have a gen­er­al rule of sup­port­ing pro-Is­rael leg­is­la­tion un­less it in­cludes a poi­son pill — like cuts to do­mes­tic pol­i­cy,” he said.

In ad­di­tion to the writ­ten ve­to threat, the White House has been in touch with var­i­ous law­mak­ers and con­gres­sion­al aides about the leg­is­la­tion, ac­cord­ing to an ad­min­is­tra­tion of­fi­cial.

“We strong­ly, strong­ly op­pose at­tempts to con­strain the Pres­i­dent’s abil­i­ty to de­ploy U.S. se­cu­ri­ty as­sis­tance con­sis­tent with U.S. for­eign pol­i­cy and na­tion­al se­cu­ri­ty ob­jec­tives,” White House press sec­re­tary Karine Jean-Pierre said this week, adding that the ad­min­is­tra­tion plans to spend “every last cent” ap­pro­pri­at­ed by Con­gress in the na­tion­al se­cu­ri­ty sup­ple­men­tal pack­age that was signed in­to law by Biden last month.

As­so­ci­at­ed Press writ­ers Stephen Groves, Lisa Mas­caro and Aamer Mad­hani con­tributed.

WASH­ING­TON (AP) —