The explosion came as a senior US diplomat was visiting Kabul to brief Afghan President Ashraf Ghani on a draft peace accord reached with the insurgents that could see thousands of US troops withdrawn from Afghanistan.
Trump's remarks followed a meeting with Pakistan Prime Minister Imran Khan at the White House on Monday at which Trump voiced optimism that Pakistan could help broker a political settlement to end the nearly 18-year-old war in Afghanistan.
There was no immediate claim of responsibility for the blast, which came a day after militant group Islamic State claimed a suicide attack outside a military training academy that killed at least six people.
The attacks came on Nowruz, an ancient Persian festival to mark the start of spring that is widely celebrated in Afghanistan but has also faced opposition from some hardline Islamists, who say it is un-Islamic.
Interior Ministry spokesman Nasrat Rahimi says Shiite worshippers came to the Karti Sakhi shrine in the Afghan capital when the blasts took place on Thursday morning in the Shiite neighborhood. It's unclear what caused the explosions.
Kabul blast: A car bomb exploded in Afghanistan’s capital city Kabul , killing several people and injuring scores of others. External Affairs Minister Sushma Swaraj confirmed that the staff at the Indian Embassy in Kabul are safe.
Millions of people in Kabul live with pollution and toxic particles in the air. Local environmental groups say the situation in the Afghan capital is potentially killing thousands of people every year.