Following the devastating terror attacks at Istanbul's Atatürk airport, AT&T , Sprint , T-Mobile , and Verizon have announced that their customers can call and text friends and family in Turkey for free.

T-Mobile CEO John Legere condemned the attack, saying that the carrier will offer free calls and texts to Turkey through July 5:

The attack in Istanbul is horrifying & senseless. We're making it free to call/text from the US to Turkey thru Tues. https://t.co/ZXXeFsYzCL — John Legere (@JohnLegere) June 29, 2016

Sprint CEO mentioned that all calls and texts to Turkey from Sprint, Virgin Mobile USA, and Boost Mobile customers will be waived off until July 5:

From AT&T:

AT&T will waive or credit charges incurred for consumer or business calls placed by AT&T's customers from the United States to Turkey between June 28, 2016 to June 30, 2016, in the local time zone. This includes landline, texting, and mobility (Postpaid and GoPhone) calls.

Verizon is offering free calls and texts to Turkey until June 29:

More than 170,000 Verizon employees worldwide extend condolences to all our friends and family in Turkey. In this time of uncertainty, we want to support our customers affected by the attack at Ataturk airport in Istanbul, Turkey, so Verizon is offering free wireless and wireline calling from the U.S. to Turkey to connect with family and friends. Wireless users will incur no charges for texts or international long distance calls originating from the U.S. to Turkey on June 28 and 29, 2016 (applicable taxes and surcharges will apply). Home wireline telephone customers can make free calls to Turkey on June 28 and 29, 2016 (applicable taxes and surcharges will apply).