April 12 2018 06:50 p
White House spokeswoman Sarah Sanders said no final decisions on a possible strike on Syria had yet been made and some options remained on the table.
"The US president has not set a timetable for a possible move against Syria," she said.
She added that Trump had a number of options on Syria as well as the missile strike, noting that the air strike Trump mentioned in his twitter "one of the options offered."
"The United States does not rule out the possibility of strikes against Russian forces in Syria during the planned military response against Syria," she said. "Trump considers Syria and Russia to be responsible for this (chemical) attack."
On President Trump's threats via Twitter and the possibility of a clash between US and Russian forces, Sanders replied that "this means that all options are in place."
The US president, Donald Trump, has vowed to bomb Syria with modern and smart missiles, calling on Russia to prepare to repel them and stop backing Syrian President Bashar al-Assad, who he described as "the killer animal of his people."