Bahrain's security forces are the backbone of the Al Khalifa regime, now facing unprecedented unrest after overnight shootings. But large numbers of their personnel are recruited from other countries, including Jordan, Pakistan and Yemen.
Tanks and troops from Saudi Arabia were also reported to have been deployed in support of Bahraini forces.
Precise numbers are a closely guarded secret…
Here is more, yet no numbers. The implied prediction is that they are willing to shoot.