Members of the Israeli special forces check the apparent remains of a ballistic missile lying on the ground following missile attacks by Iran in June. Gil Eliyahu/Reuters

US lawmakers have called for the Trump administration to respond to reporting that Chinese firms are helping Iran rebuild its ballistic missile program in defiance of United Nations sanctions.

The call, from Representatives Raja Krishnamoorthi and Joe Courtney, follows CNN reporting last month detailing what Western intelligence sources said were several shipments of sodium perchlorate, a missile propellant precursor, from China to Iran since the end of September.

These shipments are “indispensable to Tehran’s efforts to rebuild its ballistic missile arsenal following its 12-day war with Israel last summer,” the

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