"Six civilians were injured by a bomb explosion inside a bus in ... the al-Zahra neighbourhood," SANA said, quoting the head of Homs police force.
A number of bombings struck cities under Syrian government control last year, including the capital Damascus, and a similar bus explosion hit Homs in mid-march, the Syrian Observatory for Human Rights war monitor said.
Islamic State and the rebel Tahrir al-Sham alliance — led by fighters formerly linked to al-Qaeda — have claimed some of the deadly attacks.
Syrian state television station al-Ikhbariya showed pictures of a white minibus it said had been damaged by the bomb. (Reporting by Lisa Barrington, Editing by Robin Pomeroy, William Maclean)
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